001443
說明：443是美國內部城市馬里蘭州之間的長途區號，從美國以外撥打馬里蘭州電話需要加上美國的國際區號1，也就是美國馬里蘭州的國際城市區號為001443或者寫為001-443、0010443、+1-443、+1+443、+1443、00-1-443、00 1 443。
以443開頭的號碼前綴列表
| 號碼前綴 | 固話/手機 | 主要城市 | 運營商 |
| (443) 200- | 固話 | Baltimore | Allegiance Telecom |
| (443) 201- | 手機 | Westminster | Cellco Partnership DBA Verizon Wireless |
| (443) 202- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 203- | 固話 | West River | Verizon Maryland |
| (443) 204- | 手機 | Pikesville | New Cingular Wireless PCS - DC |
| (443) 205- | 手機 | Cambridge | Sprint Spectrum L.p. |
| (443) 206- | 手機 | Perryville | Cellco Partnership DBA Verizon Wireless |
| (443) 207- | 手機 | Elkton | Omnipoint Communications Enterprises, L.p. |
| (443) 208- | 固話 | Essex | Sprint Spectrum L.p. |
| (443) 209- | 固話 | Havre De Grace | Cavalier Telephone (mid-atlantic) |
| (443) 210- | 固話 | Aberdeen | Sprint Spectrum L.p. |
| (443) 212- | 固話 | Sparks Glencoe | Us Lec Of Maryland |
| (443) 213- | 固話 | Baltimore | Verizon Maryland |
| (443) 214- | 固話 | Annapolis | New Cingular Wireless PCS - DC |
| (443) 215- | 固話 | Chestertown | Core Communications |
| (443) 216- | 固話 | Dundalk | Cavalier Telephone Mid-atlantic |
| (443) 217- | 固話 | Annapolis | Core Communications |
| (443) 218- | 固話 | Reisterstown | Global Crossing Local Services-md |
| (443) 219- | 固話 | Baltimore | Level 3 Communications |
| (443) 220- | 固話 | Baltimore | Verizon Maryland |
| (443) 221- | 固話 | Annapolis | Level 3 Communications |
| (443) 222- | 固話 | Reisterstown | Xo Maryland |
| (443) 223- | 手機 | Annapolis | Cellco Partnership DBA Verizon Wireless |
| (443) 224- | 固話 | Baltimore | Mci Worldcom Communications |
| (443) 225- | 固話 | Cambridge | Sprint Spectrum L.p. |
| (443) 226- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 227- | 固話 | Port Deposit | Ctc Communications Corp. |
| (443) 228- | 固話 | Middle River | Us Lec Of Maryland |
| (443) 229- | 固話 | Severna Park | Cavalier Telephone Mid-atlantic |
| (443) 230- | 固話 | Odenton | Ctc Communications Corp. |
| (443) 231- | 固話 | Baltimore | AT&T Local |
| (443) 232- | 固話 | Willards | Cavalier Telephone (mid-atlantic) |
| (443) 233- | 固話 | Mardela Springs | Cavalier Telephone (mid-atlantic) |
| (443) 234- | 固話 | Snow Hill | Cavalier Telephone (mid-atlantic) |
| (443) 235- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 236- | 固話 | Cardiff | Core Communications |
| (443) 237- | 固話 | North Beach | Core Communications |
| (443) 238- | 固話 | Parkton | Ctc Communications Corp. |
| (443) 239- | 手機 | Easton | New Cingular Wireless PCS - DC |
| (443) 240- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 241- | 固話 | Westminster | Global Naps South |
| (443) 242- | 固話 | Sparrows Point | Cavalier Telephone Mid-atlantic |
| (443) 243- | 手機 | Fallston | Cellco Partnership DBA Verizon Wireless |
| (443) 244- | 固話 | Westminster | Level 3 Communications |
| (443) 245- | 固話 | Elkton | Cavalier Telephone (mid-atlantic) |
| (443) 246- | 固話 | Elkton | Core Communications |
| (443) 247- | 固話 | Union Bridge | Ctc Communications Corp. |
| (443) 248- | 手機 | Catonsville | Cellco Partnership DBA Verizon Wireless |
| (443) 249- | 固話 | Stevensville | Verizon Maryland |
| (443) 250- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 251- | 手機 | Chestertown | Local Access LLC |
| (443) 252- | 手機 | Perryville | Cellco Partnership DBA Verizon Wireless |
| (443) 253- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 254- | 手機 | Annapolis | Omnipoint Communications Cap Operations |
| (443) 255- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 256- | 固話 | North East | Ctc Communications Corp. |
| (443) 257- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 258- | 手機 | Easton | New Cingular Wireless PCS - DC |
| (443) 259- | 固話 | Columbia | Verizon Maryland |
| (443) 260- | 固話 | Salisbury | Verizon Maryland |
| (443) 261- | 固話 | Severna Park | Mci Worldcom Communications |
| (443) 262- | 固話 | Centreville | Verizon Maryland |
| (443) 263- | 固話 | Baltimore | Verizon Maryland |
| (443) 264- | 固話 | Pikesville | Xo Maryland |
| (443) 265- | 固話 | Fork | Cavalier Telephone Mid-atlantic |
| (443) 266- | 固話 | Glenwood | Global Crossing Local Services-md |
| (443) 267- | 固話 | Darlington | Teleport Communications America |
| (443) 268- | 固話 | Baltimore | Core Communications |
| (443) 269- | 固話 | Towson | Xo Maryland |
| (443) 270- | 固話 | Baltimore | Paetec Communications |
| (443) 271- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 272- | 固話 | Baltimore | Teleport Communications America |
| (443) 273- | 固話 | Reisterstown | Teleport Communications America |
| (443) 274- | 固話 | Severn | Verizon Maryland |
| (443) 275- | 固話 | Baltimore | Comcast Phone Of Northern Maryland |
| (443) 276- | 固話 | Baltimore | Allegiance Telecom |
| (443) 277- | 手機 | Sykesville | Sprint Spectrum L.p. |
| (443) 278- | 固話 | Baltimore | Vdl DBA Global Telecom Brokers |
| (443) 279- | 固話 | Baltimore | Allegiance Telecom |
| (443) 280- | 手機 | Sykesville | New Cingular Wireless PCS - DC |
| (443) 281- | 固話 | Baltimore | Allegiance Telecom |
| (443) 282- | 手機 | Chestertown | Sprint Spectrum L.p. |
| (443) 283- | 固話 | Baltimore | Paetec Communications |
| (443) 284- | 固話 | Jessup | Xo Maryland |
| (443) 285- | 固話 | Columbia | Verizon Maryland |
| (443) 286- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 287- | 固話 | Baltimore | Verizon Maryland |
| (443) 288- | 固話 | Baltimore | Allegiance Telecom |
| (443) 289- | 固話 | Westminster | Mci Worldcom Communications |
| (443) 290- | 固話 | Parkville | Tw Telecom Of Maryland LLC |
| (443) 291- | 固話 | Hampstead | Global Crossing Local Services-md |
| (443) 292- | 固話 | Laurel | Level 3 Communications |
| (443) 293- | 固話 | Westminster | Global Crossing Local Services-md |
| (443) 294- | 固話 | West River | Global Crossing Local Services-md |
| (443) 295- | 固話 | Prince Frederick | Level 3 Communications |
| (443) 296- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 297- | 固話 | Arbutus | Teleport Communications America |
| (443) 298- | 手機 | Easton | New Cingular Wireless PCS - DC |
| (443) 299- | 固話 | Fallston | Global Crossing Local Services-md |
| (443) 300- | 固話 | Sykesville | Broadwing Communications. LLC |
| (443) 301- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 302- | 固話 | Crofton | Global Crossing Local Services-md |
| (443) 303- | 固話 | Aberdeen | Global Crossing Local Services-md |
| (443) 304- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 305- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 306- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 307- | 固話 | Bel Air | Global Crossing Local Services-md |
| (443) 308- | 固話 | Baltimore | Allegiance Telecom |
| (443) 309- | 手機 | Elkton | Sprint Spectrum L.p. |
| (443) 310- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 312- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 313- | 固話 | Fork | Global Crossing Local Services-md |
| (443) 314- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 315- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 316- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 317- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 318- | 固話 | Cockeysville | Cavalier Telephone (mid-atlantic) |
| (443) 319- | 固話 | Columbia | Cavalier Telephone (mid-atlantic) |
| (443) 320- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 321- | 固話 | Annapolis | Paetec Communications |
| (443) 322- | 固話 | Towson | Cavalier Telephone Mid-atlantic |
| (443) 323- | 固話 | Rhodesdale | Cavalier Telephone (mid-atlantic) |
| (443) 324- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 325- | 固話 | Ellicott City | Cavalier Telephone Mid-atlantic |
| (443) 326- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 327- | 固話 | Aberdeen | Cavalier Telephone Mid-atlantic |
| (443) 328- | 固話 | Sykesville | Ctc Communications Corp. |
| (443) 329- | 固話 | Jessup | Global Crossing Local Services-md |
| (443) 330- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 331- | 固話 | Taneytown | Ctc Communications Corp. |
| (443) 332- | 固話 | Crofton | Cavalier Telephone Mid-atlantic |
| (443) 333- | 手機 | Annapolis | Leap Wireless Intl DBA Cricket Comm |
| (443) 334- | 固話 | Towson | Allegiance Telecom |
| (443) 335- | 固話 | Brooklyn | Xo Maryland |
| (443) 336- | 手機 | Annapolis | Sprint Spectrum L.p. |
| (443) 337- | 固話 | Sparrows Point | Xo Maryland |
| (443) 338- | 固話 | Sparks Glencoe | Ctc Communications Corp. |
| (443) 339- | 固話 | Sherwood Forest | Ctc Communications Corp. |
| (443) 340- | 手機 | Westminster | Cellco Partnership DBA Verizon Wireless |
| (443) 341- | 固話 | Baltimore | Level 3 Communications |
| (443) 342- | 固話 | Solomons | Ctc Communications Corp. |
| (443) 343- | 固話 | Millersville | Teleport Communications America |
| (443) 344- | 固話 | Severna Park | Core Communications |
| (443) 345- | 固話 | Aberdeen | Level 3 Communications |
| (443) 346- | 固話 | Severna Park | Xo Maryland |
| (443) 347- | 固話 | Cardiff | Ctc Communications Corp. |
| (443) 348- | 固話 | Baltimore | Teleport Communications America |
| (443) 349- | 固話 | Westminster | Core Communications |
| (443) 350- | 手機 | Elkton | Cellco Partnership DBA Verizon Wireless |
| (443) 351- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 352- | 固話 | Baltimore | AT&T Local |
| (443) 353- | 固話 | Cockeysville | Verizon Maryland |
| (443) 354- | 固話 | Baltimore | Level 3 Communications |
| (443) 355- | 固話 | Baltimore | Level 3 Communications |
| (443) 356- | 固話 | Bel Air | Level 3 Communications |
| (443) 357- | 固話 | Pikesville | Verizon Maryland |
| (443) 358- | 固話 | Salisbury | Ymax Communications Corp. |
| (443) 359- | 手機 | Delmar | Cellco Partnership DBA Verizon Wireless |
| (443) 360- | 固話 | Aberdeen | Teleport Communications America |
| (443) 361- | 固話 | Sykesville | Core Communications |
| (443) 362- | 手機 | Easton | Omnipoint Communications Cap Operations |
| (443) 363- | 固話 | Severn | Xo Maryland |
| (443) 364- | 固話 | Baltimore | Teleport Communications America |
| (443) 365- | 手機 | Salisbury | Omnipoint Communications Cap Operations |
| (443) 366- | 手機 | Salisbury | Sprint Spectrum L.p. |
| (443) 367- | 固話 | Columbia | Verizon Maryland |
| (443) 368- | 固話 | Westminster | Core Communications |
| (443) 369- | 固話 | Bel Air | Core Communications |
| (443) 370- | 固話 | Annapolis | New Cingular Wireless PCS - DC |
| (443) 371- | 固話 | Bel Air | Broadwing Communications. LLC |
| (443) 372- | 固話 | Edgewood | Us Lec Of Maryland |
| (443) 373- | 手機 | Ocean City | Sprint Spectrum L.p. |
| (443) 374- | 固話 | Aberdeen | Cavalier Telephone (mid-atlantic) |
| (443) 375- | 手機 | Hampstead | Sprint Spectrum L.p. |
| (443) 376- | 固話 | Baltimore | Teleport Communications America |
| (443) 377- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 378- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 379- | 固話 | Pikesville | Comcast Phone Of Northern Maryland |
| (443) 380- | 固話 | Baltimore | Level 3 Communications |
| (443) 381- | 固話 | Reisterstown | Xo Maryland |
| (443) 382- | 固話 | Cambridge | Core Communications |
| (443) 383- | 固話 | Westminster | Ctc Communications Corp. |
| (443) 384- | 固話 | Parkville | Cavalier Telephone Mid-atlantic |
| (443) 385- | 固話 | Easton | Core Communications |
| (443) 386- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 387- | 固話 | Pocomoke | Core Communications |
| (443) 388- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 389- | 固話 | Salisbury | Core Communications |
| (443) 390- | 固話 | Churchville | Global Crossing Local Services-md |
| (443) 391- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 392- | 固話 | Baltimore | AT&T Local |
| (443) 393- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 394- | 固話 | Pikesville | Verizon Maryland |
| (443) 395- | 固話 | Aberdeen | Verizon Maryland |
| (443) 396- | 固話 | Odenton | Global Crossing Local Services-md |
| (443) 397- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 398- | 手機 | Sykesville | Sprint Spectrum L.p. |
| (443) 399- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 400- | 固話 | Baltimore | Xo Maryland |
| (443) 401- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 402- | 固話 | Edgewood | Teleport Communications America |
| (443) 403- | 固話 | Aberdeen | Broadwing Communications. LLC |
| (443) 404- | 手機 | Solomons | Sprint Spectrum L.p. |
| (443) 405- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 406- | 固話 | Elkton | Teleport Communications America |
| (443) 407- | 固話 | Baltimore | Allegiance Telecom |
| (443) 408- | 固話 | Baltimore | Xo Maryland |
| (443) 409- | 固話 | Edgewood | Cavalier Telephone Mid-atlantic |
| (443) 410- | 固話 | Baltimore | Centurylink Communications LLC |
| (443) 412- | 固話 | Churchville | Teleport Communications America |
| (443) 413- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 414- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 415- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 416- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 417- | 固話 | Fallston | Teleport Communications America |
| (443) 418- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 419- | 固話 | Glenwood | Cavalier Telephone Mid-atlantic |
| (443) 420- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 421- | 手機 | Fork | New Cingular Wireless PCS - DC |
| (443) 422- | 手機 | Glen Burnie | Leap Wireless Intl DBA Cricket Comm |
| (443) 423- | 固話 | Baltimore | Broadwing Communications. LLC |
| (443) 424- | 固話 | Cardiff | Teleport Communications America |
| (443) 425- | 固話 | Baltimore | AT&T Local |
| (443) 426- | 固話 | Baltimore | Paetec Communications |
| (443) 427- | 固話 | Princess Anne | Core Communications |
| (443) 428- | 固話 | Cockeysville | Core Communications |
| (443) 429- | 固話 | Woodlawn | Cavalier Telephone Mid-atlantic |
| (443) 430- | 固話 | Baltimore | Xo Maryland |
| (443) 431- | 固話 | Randallstown | Xo Maryland |
| (443) 432- | 固話 | Prince Frederick | Ctc Communications Corp. |
| (443) 433- | 固話 | Annapolis | Xo Maryland |
| (443) 434- | 固話 | Federalsburg | Comcast Phone Of Northern Maryland |
| (443) 435- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 436- | 固話 | Woodlawn | Verizon Maryland |
| (443) 437- | 固話 | Pocomoke | Teleport Communications America |
| (443) 438- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 439- | 固話 | Trappe | Cellco Partnership DBA Verizon Wireless |
| (443) 440- | 固話 | Annapolis | Verizon Maryland |
| (443) 441- | 固話 | Glenwood | Teleport Communications America |
| (443) 442- | 固話 | Parkville | Cavalier Telephone Mid-atlantic |
| (443) 444- | 固話 | Baltimore | Verizon Maryland |
| (443) 445- | 固話 | Elkridge | Verizon Maryland |
| (443) 446- | 固話 | Queenstown | Mci Worldcom Communications |
| (443) 447- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 448- | 固話 | Denton | Comcast Phone Of Northern Maryland |
| (443) 449- | 固話 | Baltimore | Broadview Networks |
| (443) 450- | 固話 | Baltimore | Level 3 Communications |
| (443) 451- | 固話 | Baltimore | Paetec Communications |
| (443) 452- | 固話 | Baltimore | Us Lec Of Maryland |
| (443) 453- | 固話 | Baltimore | Neutral Tandem-maryland |
| (443) 454- | 手機 | Annapolis | Omnipoint Communications Cap Operations |
| (443) 455- | 固話 | Baltimore | Verizon Maryland |
| (443) 456- | 固話 | Edgewood | AT&T Local |
| (443) 457- | 固話 | Baltimore | Teleport Communications America |
| (443) 458- | 固話 | Annapolis | Allegiance Telecom |
| (443) 459- | 固話 | Baltimore | Paetec Communications |
| (443) 460- | 固話 | Baltimore | Allegiance Telecom |
| (443) 461- | 固話 | Parkville | Us Lec Of Maryland |
| (443) 462- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 463- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 464- | 固話 | Churchville | Broadview Networks |
| (443) 465- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 466- | 手機 | Elkton | Sprint Spectrum L.p. |
| (443) 467- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 468- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 469- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 470- | 固話 | Towson | Us Lec Of Maryland |
| (443) 471- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 472- | 固話 | Baltimore | Level 3 Communications |
| (443) 473- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 474- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 475- | 固話 | Baltimore | Mci Worldcom Communications |
| (443) 476- | 手機 | Annapolis | Verizon Maryland |
| (443) 477- | 手機 | Cambridge | Cellco Partnership DBA Verizon Wireless |
| (443) 478- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 479- | 固話 | Laurel | Verizon Maryland |
| (443) 480- | 手機 | Chestertown | Cellco Partnership DBA Verizon Wireless |
| (443) 481- | 固話 | Annapolis | Us Lec Of Maryland |
| (443) 482- | 固話 | Annapolis | Verizon Maryland |
| (443) 483- | 固話 | Cardiff | Broadwing Communications. LLC |
| (443) 484- | 固話 | Edgewood | Broadwing Communications. LLC |
| (443) 485- | 固話 | Elkton | Broadwing Communications. LLC |
| (443) 486- | 固話 | Prince Frederick | Broadwing Communications. LLC |
| (443) 487- | 固話 | Westminster | Broadwing Communications. LLC |
| (443) 488- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 489- | 固話 | Baltimore | Teleport Communications America |
| (443) 490- | 固話 | Edgewood | Global Crossing Local Services-md |
| (443) 491- | 固話 | Parkton | Global Crossing Local Services-md |
| (443) 492- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 493- | 手機 | Delmar | Cellco Partnership DBA Verizon Wireless |
| (443) 494- | 固話 | Millersville | Global Crossing Local Services-md |
| (443) 495- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 496- | 手機 | Easton | Sprint Spectrum L.p. |
| (443) 497- | 手機 | Salisbury | Sprint Spectrum L.p. |
| (443) 498- | 固話 | Baltimore | Allegiance Telecom |
| (443) 499- | 固話 | Jarrettsville | Global Crossing Local Services-md |
| (443) 500- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 501- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 502- | 固話 | Havre De Grace | Teleport Communications America |
| (443) 503- | 固話 | Baltimore | Xo Maryland |
| (443) 504- | 固話 | Fallston | Cavalier Telephone Mid-atlantic |
| (443) 505- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 506- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 507- | 固話 | Hampstead | Teleport Communications America |
| (443) 508- | 固話 | Hampstead | Cavalier Telephone Mid-atlantic |
| (443) 509- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 510- | 手機 | Annapolis | Cellco Partnership DBA Verizon Wireless |
| (443) 512- | 固話 | Edgewood | Verizon Maryland |
| (443) 513- | 手機 | Berlin | New Cingular Wireless PCS - DC |
| (443) 514- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 515- | 手機 | Cambridge | Cellco Partnership DBA Verizon Wireless |
| (443) 516- | 固話 | Sykesville | Global Crossing Local Services-md |
| (443) 517- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 518- | 固話 | Columbia | Verizon Maryland |
| (443) 519- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 520- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 521- | 手機 | Cambridge | Cellco Partnership DBA Verizon Wireless |
| (443) 522- | 固話 | Reisterstown | Paetec Communications |
| (443) 523- | 固話 | Salisbury | Verizon Maryland |
| (443) 524- | 固話 | Baltimore | Allegiance Telecom |
| (443) 525- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 526- | 固話 | Havre De Grace | Ctc Communications Corp. |
| (443) 527- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 528- | 手機 | Bel Air | Sprint Spectrum L.p. |
| (443) 529- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 530- | 固話 | Baltimore | Paetec Communications |
| (443) 531- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 532- | 手機 | Prince Frederick | Sprint Spectrum L.p. |
| (443) 533- | 固話 | Jarrettsville | Teleport Communications America |
| (443) 534- | 固話 | Annapolis | Cellco Partnership DBA Verizon Wireless |
| (443) 535- | 固話 | Columbia | Verizon Maryland |
| (443) 536- | 手機 | Westminster | Sprint Spectrum L.p. |
| (443) 537- | 固話 | Columbia | Verizon Maryland |
| (443) 538- | 手機 | Columbia | Omnipoint Communications Cap Operations |
| (443) 539- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 540- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 541- | 固話 | Baltimore | Paetec Communications |
| (443) 542- | 固話 | Columbia | Comcast Phone Of Northern Maryland |
| (443) 543- | 固話 | Arbutus | Verizon Maryland |
| (443) 544- | 固話 | Pikesville | Cavalier Telephone Mid-atlantic |
| (443) 545- | 固話 | Columbia | Broadwing Communications. LLC |
| (443) 546- | 固話 | Baltimore | Verizon Maryland |
| (443) 547- | 手機 | Westminster | Cellco Partnership DBA Verizon Wireless |
| (443) 548- | 固話 | Baltimore | Allegiance Telecom |
| (443) 549- | 固話 | Dundalk | Us Lec Of Maryland |
| (443) 550- | 固話 | North Beach | Level 3 Communications |
| (443) 551- | 固話 | Baltimore | Level 3 Communications |
| (443) 552- | 固話 | Baltimore | Verizon Maryland |
| (443) 553- | 手機 | Elkton | Cellco Partnership DBA Verizon Wireless |
| (443) 554- | 手機 | Middle River | Omnipoint Communications Cap Operations |
| (443) 556- | 固話 | Cockeysville | Verizon Maryland |
| (443) 557- | 固話 | Baltimore | Allegiance Telecom |
| (443) 558- | 固話 | Aberdeen | Xo Maryland |
| (443) 559- | 固話 | Essex | Comcast Phone Of Northern Maryland |
| (443) 560- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 561- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 562- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 563- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 564- | 固話 | Baltimore | Level 3 Communications |
| (443) 565- | 固話 | Randallstown | Cavalier Telephone Mid-atlantic |
| (443) 566- | 手機 | Chesapeake City | Cellco Partnership DBA Verizon Wireless |
| (443) 567- | 固話 | Bel Air | Level 3 Communications |
| (443) 568- | 固話 | Arbutus | Allegiance Telecom |
| (443) 569- | 固話 | Annapolis | Level 3 Communications |
| (443) 570- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 571- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 572- | 固話 | Glen Burnie | Verizon Maryland |
| (443) 573- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 574- | 固話 | Ellicott City | Us Lec Of Maryland |
| (443) 575- | 固話 | Arbutus | Cavalier Telephone Mid-atlantic |
| (443) 576- | 固話 | Baltimore | Allegiance Telecom |
| (443) 577- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 578- | 固話 | Baltimore | Xo Maryland |
| (443) 579- | 固話 | Essex | Us Lec Of Maryland |
| (443) 580- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 581- | 固話 | Middle River | Xo Maryland |
| (443) 582- | 固話 | Churchville | Ctc Communications Corp. |
| (443) 583- | 固話 | Columbia | Ctc Communications Corp. |
| (443) 584- | 固話 | Crofton | Ctc Communications Corp. |
| (443) 585- | 固話 | Darlington | Ctc Communications Corp. |
| (443) 586- | 固話 | Dundalk | Xo Maryland |
| (443) 587- | 固話 | Edgewood | Ctc Communications Corp. |
| (443) 588- | 固話 | Baltimore | Allegiance Telecom |
| (443) 589- | 固話 | Cockeysville | Us Lec Of Maryland |
| (443) 590- | 固話 | Reisterstown | Global Crossing Local Services-md |
| (443) 591- | 手機 | Glen Burnie | Cellco Partnership DBA Verizon Wireless |
| (443) 592- | 固話 | Elkridge | Xo Maryland |
| (443) 593- | 固話 | Elkton | Ctc Communications Corp. |
| (443) 594- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 595- | 固話 | Sparks Glencoe | Global Crossing Local Services-md |
| (443) 596- | 固話 | Essex | Xo Maryland |
| (443) 597- | 固話 | Severna Park | Global Crossing Local Services-md |
| (443) 598- | 固話 | Sherwood Forest | Global Crossing Local Services-md |
| (443) 599- | 固話 | Baltimore | Global Crossing Local Services-md |
| (443) 600- | 手機 | Essex | Omnipoint Communications Cap Operations |
| (443) 601- | 固話 | Fallston | Ctc Communications Corp. |
| (443) 602- | 手機 | Catonsville | Cellco Partnership DBA Verizon Wireless |
| (443) 603- | 固話 | Annapolis | Paetec Communications |
| (443) 604- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 605- | 固話 | Westminster | Cavalier Telephone Mid-atlantic |
| (443) 606- | 固話 | Fork | Ctc Communications Corp. |
| (443) 607- | 固話 | West River | Cavalier Telephone Mid-atlantic |
| (443) 608- | 手機 | Towson | Leap Wireless Intl DBA Cricket Comm |
| (443) 609- | 固話 | Sykesville | Cavalier Telephone Mid-atlantic |
| (443) 610- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 612- | 固話 | Catonsville | Verizon Maryland |
| (443) 613- | 手機 | Towson | Leap Wireless Intl DBA Cricket Comm |
| (443) 614- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 615- | 手機 | Catonsville | Cellco Partnership DBA Verizon Wireless |
| (443) 616- | 固話 | Bel Air | Cavalier Telephone Mid-atlantic |
| (443) 617- | 手機 | Fallston | Cellco Partnership DBA Verizon Wireless |
| (443) 618- | 手機 | Glen Burnie | Cellco Partnership DBA Verizon Wireless |
| (443) 619- | 手機 | Bel Air | Cellco Partnership DBA Verizon Wireless |
| (443) 620- | 固話 | Baltimore | Teleport Communications America |
| (443) 621- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 622- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 623- | 手機 | Glen Burnie | Sprint Spectrum L.p. |
| (443) 624- | 手機 | Prince Frederick | Cellco Partnership DBA Verizon Wireless |
| (443) 625- | 固話 | Fork | Broadwing Communications. LLC |
| (443) 626- | 固話 | Middle River | Cavalier Telephone Mid-atlantic |
| (443) 627- | 固話 | Baltimore | Verizon Maryland |
| (443) 628- | 固話 | Glen Burnie | Xo Maryland |
| (443) 629- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 630- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 631- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 632- | 固話 | Towson | Us Lec Of Maryland |
| (443) 633- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 634- | 固話 | Odenton | Verizon Maryland |
| (443) 635- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 636- | 固話 | Catonsville | Omnipoint Communications Cap Operations |
| (443) 637- | 固話 | Baltimore | Xo Maryland |
| (443) 638- | 固話 | Ellicott City | Global Naps South |
| (443) 639- | 固話 | Hampstead | Ctc Communications Corp. |
| (443) 640- | 固話 | Bel Air | Us Lec Of Maryland |
| (443) 641- | 固話 | Pikesville | Broadwing Communications. LLC |
| (443) 642- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 643- | 固話 | Bel Air | Verizon Maryland |
| (443) 644- | 固話 | Jarrettsville | Ctc Communications Corp. |
| (443) 645- | 固話 | Millersville | Ctc Communications Corp. |
| (443) 646- | 固話 | North Beach | Ctc Communications Corp. |
| (443) 647- | 固話 | New Windsor | Ctc Communications Corp. |
| (443) 648- | 固話 | Baltimore | Teleport Communications America |
| (443) 649- | 固話 | Sparrows Point | Us Lec Of Maryland |
| (443) 650- | 固話 | Reisterstown | Allegiance Telecom |
| (443) 651- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 652- | 固話 | Towson | Verizon Maryland |
| (443) 653- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 654- | 固話 | Jessup | Verizon Maryland |
| (443) 655- | 手機 | Bel Air | New Cingular Wireless PCS - DC |
| (443) 656- | 固話 | Columbia | Cavalier Telephone Mid-atlantic |
| (443) 657- | 固話 | Randallstown | Tw Telecom Of Maryland LLC |
| (443) 658- | 固話 | Woodlawn | Global Naps South |
| (443) 659- | 固話 | West River | Global Naps South |
| (443) 660- | 固話 | Baltimore | Comcast Phone Of Northern Maryland |
| (443) 661- | 固話 | Jessup | Cavalier Telephone Mid-atlantic |
| (443) 662- | 固話 | Sparks Glencoe | Cavalier Telephone Mid-atlantic |
| (443) 663- | 固話 | Woodlawn | Verizon Maryland |
| (443) 664- | 固話 | Ocean City | Cavalier Telephone (mid-atlantic) |
| (443) 665- | 固話 | Nanticoke | Cavalier Telephone (mid-atlantic) |
| (443) 666- | 手機 | Chestertown | Level 3 Communications |
| (443) 668- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 669- | 固話 | Delmar | Cavalier Telephone (mid-atlantic) |
| (443) 670- | 固話 | Catonsville | Cavalier Telephone Mid-atlantic |
| (443) 671- | 固話 | New Windsor | Teleport Communications America |
| (443) 672- | 固話 | Parkton | Teleport Communications America |
| (443) 673- | 固話 | Brooklyn | Cavalier Telephone Mid-atlantic |
| (443) 674- | 固話 | North East | Teleport Communications America |
| (443) 675- | 固話 | Randallstown | Cavalier Telephone (mid-atlantic) |
| (443) 676- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 677- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 678- | 固話 | Parkville | Verizon Maryland |
| (443) 679- | 固話 | Baltimore | Teleport Communications America |
| (443) 680- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 681- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 682- | 固話 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 683- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 684- | 手機 | Prince Frederick | Cellco Partnership DBA Verizon Wireless |
| (443) 685- | 固話 | Severn | Cavalier Telephone (mid-atlantic) |
| (443) 686- | 手機 | Fallston | Sprint Spectrum L.p. |
| (443) 687- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 688- | 固話 | Severn | Cavalier Telephone Mid-atlantic |
| (443) 689- | 固話 | Cockeysville | Cavalier Telephone Mid-atlantic |
| (443) 690- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 691- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 692- | 固話 | Baltimore | Allegiance Telecom |
| (443) 693- | 固話 | Perryville | Teleport Communications America |
| (443) 694- | 手機 | Severna Park | Sprint Spectrum L.p. |
| (443) 695- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 696- | 固話 | Dundalk | Cavalier Telephone Mid-atlantic |
| (443) 697- | 固話 | Catonsville | Global Naps South |
| (443) 698- | 固話 | Odenton | Teleport Communications America |
| (443) 699- | 手機 | Annapolis | Cellco Partnership DBA Verizon Wireless |
| (443) 701- | 固話 | Arbutus | Xo Maryland |
| (443) 702- | 固話 | Pasadena | Cavalier Telephone Mid-atlantic |
| (443) 703- | 固話 | Baltimore | Xo Maryland |
| (443) 704- | 固話 | Odenton | Cavalier Telephone Mid-atlantic |
| (443) 705- | 固話 | Cockeysville | Xo Maryland |
| (443) 706- | 固話 | Crisfield | Cavalier Telephone (mid-atlantic) |
| (443) 707- | Unknown | Local Access LLC | |
| (443) 708- | 固話 | Baltimore | Tw Telecom Of Maryland LLC |
| (443) 709- | 固話 | Arbutus | Cavalier Telephone Mid-atlantic |
| (443) 710- | 固話 | Baltimore | Xo Maryland |
| (443) 712- | 固話 | Reisterstown | Cavalier Telephone Mid-atlantic |
| (443) 713- | 手機 | Columbia | Peerless Network Of Maryland |
| (443) 714- | 固話 | Columbia | Sprint Spectrum L.p. |
| (443) 715- | 固話 | North East | Cavalier Telephone (mid-atlantic) |
| (443) 716- | 固話 | Annapolis | Cavalier Telephone Mid-atlantic |
| (443) 717- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 718- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 719- | 固話 | Jarrettsville | Cavalier Telephone Mid-atlantic |
| (443) 720- | 固話 | Elkton | Xo Maryland |
| (443) 721- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 722- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 723- | 固話 | Brooklyn | Sprint Spectrum L.p. |
| (443) 724- | 固話 | Easton | Cavalier Telephone (mid-atlantic) |
| (443) 725- | 固話 | Baltimore | Paetec Communications |
| (443) 726- | 固話 | Towson | Sprint Spectrum L.p. |
| (443) 727- | 固話 | Bishopville | Cavalier Telephone (mid-atlantic) |
| (443) 728- | 固話 | Berlin | Cavalier Telephone (mid-atlantic) |
| (443) 729- | 固話 | Baltimore | Paetec Communications |
| (443) 730- | 固話 | Baltimore | Paetec Communications |
| (443) 731- | 固話 | Port Deposit | Teleport Communications America |
| (443) 732- | 固話 | Westminster | Teleport Communications America |
| (443) 733- | 固話 | Baltimore | AT&T Local |
| (443) 734- | 固話 | Severn | Verizon Maryland |
| (443) 735- | 手機 | Salisbury | New Cingular Wireless PCS - DC |
| (443) 736- | 手機 | Salisbury | New Cingular Wireless PCS - DC |
| (443) 737- | 固話 | Baltimore | Paetec Communications |
| (443) 738- | 固話 | Baltimore | Paetec Communications |
| (443) 739- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 740- | 固話 | Baltimore | Telcove Operations |
| (443) 741- | 固話 | Columbia | Mci Worldcom Communications |
| (443) 742- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 743- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 744- | 手機 | Reisterstown | Sprint Spectrum L.p. |
| (443) 745- | 手機 | Columbia | Cellco Partnership DBA Verizon Wireless |
| (443) 746- | 固話 | Easton | Level 3 Communications |
| (443) 747- | 固話 | Port Deposit | Core Communications |
| (443) 748- | 固話 | Millersville | Cavalier Telephone Mid-atlantic |
| (443) 749- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 750- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 751- | 固話 | Woodlawn | Cavalier Telephone Mid-atlantic |
| (443) 752- | 固話 | Bel Air | Cellco Partnership DBA Verizon Wireless |
| (443) 753- | 固話 | Jessup | Allegiance Telecom |
| (443) 754- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 755- | 固話 | Elkridge | Verizon Maryland |
| (443) 756- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 757- | 固話 | Elkridge | Cavalier Telephone Mid-atlantic |
| (443) 758- | 固話 | Annapolis | AT&T Local |
| (443) 759- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 760- | 固話 | Aberdeen | AT&T Local |
| (443) 761- | 手機 | Towson | Omnipoint Communications Cap Operations |
| (443) 762- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 763- | 固話 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 764- | 手機 | Glen Burnie | Omnipoint Communications Cap Operations |
| (443) 765- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 766- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 767- | 固話 | Reisterstown | Cavalier Telephone Mid-atlantic |
| (443) 768- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 769- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 770- | 固話 | Pasadena | Verizon Maryland |
| (443) 771- | 手機 | Prince Frederick | Cellco Partnership DBA Verizon Wireless |
| (443) 772- | 固話 | Essex | Cavalier Telephone Mid-atlantic |
| (443) 773- | 固話 | Baltimore | Allegiance Telecom |
| (443) 774- | 固話 | Baltimore | Global Naps South |
| (443) 776- | 固話 | Baltimore | Bandwidth.com Clec |
| (443) 777- | 固話 | Essex | Verizon Maryland |
| (443) 778- | 固話 | Laurel | Verizon Maryland |
| (443) 779- | 固話 | Aberdeen | Xo Maryland |
| (443) 780- | 固話 | Columbia | Us Lec Of Maryland |
| (443) 781- | 固話 | Pasadena | Xo Maryland |
| (443) 782- | 固話 | Annapolis | Xo Maryland |
| (443) 783- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 784- | 固話 | Baltimore | Teleport Communications America |
| (443) 785- | 固話 | Arbutus | Global Naps South |
| (443) 786- | 手機 | Easton | Cellco Partnership DBA Verizon Wireless |
| (443) 787- | 固話 | Bel Air | Ctc Communications Corp. |
| (443) 788- | 固話 | Aberdeen | Xo Maryland |
| (443) 789- | 手機 | Westminster | New Cingular Wireless PCS - DC |
| (443) 790- | 手機 | Glen Burnie | Sprint Spectrum L.p. |
| (443) 791- | 手機 | Towson | New Cingular Wireless PCS - DC |
| (443) 792- | 固話 | Brooklyn | Verizon Maryland |
| (443) 793- | 固話 | Baltimore | Xo Maryland |
| (443) 794- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 795- | 固話 | Baltimore | Xo Maryland |
| (443) 796- | 固話 | Baltimore | Xo Maryland |
| (443) 797- | 固話 | Baltimore | Xo Maryland |
| (443) 798- | 固話 | Towson | Tw Telecom Of Maryland LLC |
| (443) 799- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 800- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 801- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 802- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 803- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 804- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 805- | 手機 | Glen Burnie | Omnipoint Communications Cap Operations |
| (443) 806- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 807- | 手機 | Fallston | Sprint Spectrum L.p. |
| (443) 808- | 固話 | Annapolis | Bandwidth.com Clec |
| (443) 809- | Unknown | Level 3 Communications | |
| (443) 810- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 812- | 手機 | Columbia | Cellco Partnership DBA Verizon Wireless |
| (443) 813- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 814- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 815- | 固話 | Baltimore | Xo Maryland |
| (443) 816- | 固話 | Severna Park | Allegiance Telecom |
| (443) 817- | 固話 | Baltimore | Allegiance Telecom |
| (443) 818- | 固話 | Pasadena | Level 3 Communications |
| (443) 820- | 固話 | Baltimore | Paetec Communications |
| (443) 821- | 手機 | Westminster | Sprint Spectrum L.p. |
| (443) 822- | 手機 | Annapolis | Sprint Spectrum L.p. |
| (443) 823- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 824- | 手機 | Towson | Omnipoint Communications Cap Operations |
| (443) 825- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 826- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 827- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 828- | 固話 | Ellicott City | Cavalier Telephone Mid-atlantic |
| (443) 829- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 830- | 固話 | Catonsville | Cavalier Telephone Mid-atlantic |
| (443) 831- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 832- | 固話 | Baltimore | Level 3 Communications |
| (443) 833- | 固話 | Arbutus | Us Lec Of Maryland |
| (443) 834- | 固話 | Towson | Cavalier Telephone Mid-atlantic |
| (443) 835- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 836- | 固話 | Baltimore | Xo Maryland |
| (443) 837- | 固話 | Annapolis | Us Lec Of Maryland |
| (443) 838- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 839- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 840- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 841- | 固話 | Baltimore | Verizon Maryland |
| (443) 842- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 843- | 固話 | Havre De Grace | Verizon Maryland |
| (443) 844- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 845- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 846- | 固話 | Towson | New Cingular Wireless PCS - DC |
| (443) 847- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 848- | 固話 | Baltimore | Sprint Spectrum L.p. |
| (443) 849- | 固話 | Towson | Verizon Maryland |
| (443) 850- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 851- | 手機 | Catonsville | Omnipoint Communications Cap Operations |
| (443) 852- | 手機 | Annapolis | New Cingular Wireless PCS - DC |
| (443) 853- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 854- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 855- | 固話 | Aberdeen | Lightwave Communications |
| (443) 856- | 固話 | Ocean City | Core Communications |
| (443) 857- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 858- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 859- | 手機 | Salisbury | Omnipoint Communications Cap Operations |
| (443) 860- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 861- | 固話 | Aberdeen | Verizon Maryland |
| (443) 862- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 863- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 864- | 手機 | Columbia | Sprint Spectrum L.p. |
| (443) 865- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 866- | 手機 | Bel Air | Sprint Spectrum L.p. |
| (443) 867- | 固話 | Glen Burnie | Paetec Communications |
| (443) 868- | 固話 | Baltimore | Verizon Maryland |
| (443) 869- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 870- | 固話 | Pikesville | Tw Telecom Of Maryland LLC |
| (443) 871- | 手機 | Annapolis | Sprint Spectrum L.p. |
| (443) 872- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 873- | 固話 | Pikesville | Broadvox-clec |
| (443) 874- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 875- | 固話 | Annapolis | New Cingular Wireless PCS - DC |
| (443) 876- | 固話 | Bel Air | Sprint Spectrum L.p. |
| (443) 877- | 固話 | North East | Level 3 Communications |
| (443) 878- | 固話 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 879- | 固話 | Baltimore | Verizon Maryland |
| (443) 880- | 固話 | Salisbury | AT&T Local |
| (443) 881- | 手機 | Reisterstown | Sprint Spectrum L.p. |
| (443) 882- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 883- | 固話 | Baltimore | AT&T Local |
| (443) 884- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 885- | 固話 | Baltimore | Verizon Maryland |
| (443) 886- | 固話 | Baltimore | AT&T Local |
| (443) 887- | 固話 | Harmans | Cavalier Telephone Mid-atlantic |
| (443) 888- | 固話 | Princess Anne | Cavalier Telephone (mid-atlantic) |
| (443) 889- | 手機 | Glen Burnie | Omnipoint Communications Cap Operations |
| (443) 890- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 891- | 固話 | Baltimore | Xo Maryland |
| (443) 892- | 固話 | New Windsor | Bandwidth.com Clec |
| (443) 893- | 固話 | Baltimore | Xo Maryland |
| (443) 894- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 895- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 896- | 固話 | Baltimore | AT&T Local |
| (443) 897- | 手機 | Baltimore | Leap Wireless Intl DBA Cricket Comm |
| (443) 898- | 固話 | Pikesville | Level 3 Communications |
| (443) 899- | 固話 | Elkridge | Broadwing Communications. LLC |
| (443) 900- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 901- | 固話 | Towson | Cavalier Telephone Mid-atlantic |
| (443) 902- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 903- | 手機 | Bel Air | Cellco Partnership DBA Verizon Wireless |
| (443) 904- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 905- | 手機 | Annapolis | Sprint Spectrum L.p. |
| (443) 906- | 固話 | Severna Park | Peerless Network Of Maryland |
| (443) 907- | 手機 | Elkton | Cellco Partnership DBA Verizon Wireless |
| (443) 908- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 909- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 910- | 手機 | Bel Air | New Cingular Wireless PCS - DC |
| (443) 912- | 固話 | Towson | Core Communications |
| (443) 913- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 914- | 固話 | Reisterstown | Teleport Communications America |
| (443) 915- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 916- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 917- | 手機 | Columbia | Broadvox-clec |
| (443) 918- | 固話 | Taneytown | Teleport Communications America |
| (443) 919- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 920- | 固話 | Sykesville | Teleport Communications America |
| (443) 921- | 固話 | Baltimore | Paetec Communications |
| (443) 922- | 固話 | Edgewood | Atx Telecommunications Services, Ltd |
| (443) 923- | 固話 | Baltimore | Cavalier Telephone Mid-atlantic |
| (443) 924- | 手機 | Annapolis | Cellco Partnership DBA Verizon Wireless |
| (443) 925- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 926- | 固話 | Annapolis | Broadwing Communications. LLC |
| (443) 927- | 固話 | Baltimore | Broadwing Communications. LLC |
| (443) 928- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 929- | 手機 | Pikesville | Omnipoint Communications Cap Operations |
| (443) 930- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 931- | 固話 | Baltimore | Mci Worldcom Communications |
| (443) 932- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 933- | 固話 | Cockeysville | Teleport Communications America |
| (443) 934- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 935- | 手機 | Towson | New Cingular Wireless PCS - DC |
| (443) 937- | 固話 | Union Bridge | Teleport Communications America |
| (443) 938- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 939- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 940- | 固話 | Pikesville | Cavalier Telephone Mid-atlantic |
| (443) 941- | 手機 | Elkton | New Cingular Wireless PCS - DC |
| (443) 942- | 固話 | Severna Park | Teleport Communications America |
| (443) 943- | 固話 | Baltimore | Teleport Communications America |
| (443) 944- | 固話 | Salisbury | Comcast Phone Of Northern Maryland |
| (443) 945- | 手機 | Elkton | New Cingular Wireless PCS - DC |
| (443) 946- | 固話 | Parkville | Xo Maryland |
| (443) 947- | 固話 | Perryville | Ctc Communications Corp. |
| (443) 948- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 949- | 固話 | Annapolis | Comcast Phone Of Northern Maryland |
| (443) 951- | 固話 | Annapolis | Global Crossing Local Services-md |
| (443) 952- | 手機 | Westminster | Cellco Partnership DBA Verizon Wireless |
| (443) 953- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 954- | 固話 | Baltimore | Paetec Communications |
| (443) 955- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 956- | 手機 | Baltimore | New Cingular Wireless PCS - DC |
| (443) 957- | 固話 | Baltimore | AT&T Local |
| (443) 960- | 手機 | Glen Burnie | Cellco Partnership DBA Verizon Wireless |
| (443) 962- | 手機 | Glen Burnie | Cellco Partnership DBA Verizon Wireless |
| (443) 963- | 手機 | Baltimore | Halo Wireless Services |
| (443) 964- | 固話 | North Beach | Level 3 Communications |
| (443) 965- | 手機 | Baltimore | Sprint Spectrum L.p. |
| (443) 966- | 手機 | Fallston | Cellco Partnership DBA Verizon Wireless |
| (443) 967- | 固話 | North East | Verizon Maryland |
| (443) 968- | 手機 | Prince Frederick | New Cingular Wireless PCS - DC |
| (443) 969- | 固話 | Essex | Cavalier Telephone Mid-atlantic |
| (443) 970- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 971- | 固話 | Taneytown | Bandwidth.com Clec |
| (443) 972- | 手機 | Cambridge | Us Lec Of Maryland |
| (443) 973- | 固話 | Baltimore | Xo Maryland |
| (443) 974- | 固話 | Westminster | Teleport Communications America |
| (443) 975- | 手機 | Prince Frederick | New Cingular Wireless PCS - DC |
| (443) 976- | Unknown | Baltimore-washington Telephone (bwt) | |
| (443) 977- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 978- | 手機 | Salisbury | Cellco Partnership DBA Verizon Wireless |
| (443) 979- | 手機 | Columbia | Cellco Partnership DBA Verizon Wireless |
| (443) 980- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 981- | 手機 | Fallston | Cellco Partnership DBA Verizon Wireless |
| (443) 982- | 固話 | Baltimore | Ymax Communications Corp. |
| (443) 983- | 手機 | Baltimore | Omnipoint Communications Cap Operations |
| (443) 984- | 固話 | Baltimore | Verizon Maryland |
| (443) 985- | 手機 | Randallstown | Omnipoint Communications Cap Operations |
| (443) 986- | 手機 | Baltimore | Cellco Partnership DBA Verizon Wireless |
| (443) 987- | 固話 | Bel Air | AT&T Local |
| (443) 988- | 固話 | Centreville | Level 3 Communications |
| (443) 989- | 固話 | Glen Burnie | Cavalier Telephone Mid-atlantic |
| (443) 990- | 固話 | Baltimore | Bandwidth.com Clec |
| (443) 991- | 手機 | Towson | Cellco Partnership DBA Verizon Wireless |
| (443) 992- | 固話 | Baltimore | Level 3 Communications |
| (443) 993- | 手機 | Elkton | Metro PCS |
| (443) 994- | 手機 | Annapolis | New Cingular Wireless PCS - DC |
| (443) 995- | 手機 | Annapolis | New Cingular Wireless PCS - DC |
| (443) 996- | 手機 | Catonsville | New Cingular Wireless PCS - DC |
| (443) 997- | 固話 | Baltimore | Verizon Maryland |
| (443) 998- | 固話 | Parkville | Verizon Maryland |
友情提示：撥打長途電話的辦法很多，可以使用各通信運營商（包括中國電信、中國移動、中國聯通等）固定電話、移動手機或者上網電腦來實現通話功能，固定電話、移動手機可以直接撥打對方號碼也可以通過IP電話（又名VoIP電話、網絡電話）撥打，上網電腦可以免費與對方上網電腦通話也可以低價撥打對方固定電話、移動手機，請根據各自情況綜合考慮選用。
問題報告： 本站盡力為您提供最全面、仔細、準確的長途電話區號、手機號段歸屬、電話號碼查詢信息，但因為各個地區的合併、增加、撤銷、變更以及電話號碼方案變更、升位還有地名的多樣性等問題，難以避免出現錯誤或者過時信息，非常歡迎大家在使用中報告發現的問題或者告知更新內容。請直接在下面留言，本站核實後會馬上進行修改，以便對以後的瀏覽者有更好的幫助，非常感謝！
