Trace the Origin of Any Area Code (443) Phone Number

Area Code (443)

Area Code:443
State: Maryland (MD)
Country:USA
Top Cities:Baltimore, Annapolis, Columbia, Towson, Salisbury, Bel Air, Westminster, Catonsville, Elkton and Aberdeen
Total Cities:80
Total Counties:16
Total Prefixes:777

Area Code (443) serves 80 Cities:

Aberdeen, Annapolis, Arbutus, Baltimore, Bel Air, Berlin, Bishopville, Brooklyn, Cambridge, Cardiff, Catonsville, Centreville, Chesapeake City, Chestertown, Churchville, Cockeysville, Columbia, Crisfield, Crofton, Darlington, Delmar, Denton, Dundalk, Easton, Edgewood, Elkridge, Elkton, Ellicott City, Essex, Fallston, Federalsburg, Fork, Glen Burnie, Glenwood, Hampstead, Harmans, Havre De Grace, Jarrettsville, Jessup, Laurel, Mardela Springs, Middle River, Millersville, Nanticoke, New Windsor, North Beach, North East, Ocean City, Odenton, Parkton, Parkville, Pasadena, Perryville, Pikesville, Pocomoke, Port Deposit, Prince Frederick, Princess Anne, Queenstown, Randallstown, Reisterstown, Rhodesdale, Salisbury, Severn, Severna Park, Sherwood Forest, Snow Hill, Solomons, Sparks Glencoe, Sparrows Point, Stevensville, Sykesville, Taneytown, Towson, Trappe, Union Bridge, West River, Westminster, Willards and Woodlawn in the state of Maryland, USA.

Area Code (443) Maryland Counties:

Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil, Dorchester, Harford, Howard, Kent, Prince Georges, Queen Annes, Somerset, Talbot, Wicomico and Worcester.
Maryland Area Codes
Area Code 443 Prefixes
  Prefix CityService Provider
(443) 200- Baltimore, MDAllegiance Telecom
(443) 201- Westminster, MDCellco Partnership DBA Verizon
(443) 202- Baltimore, MDCellco Partnership DBA Verizon
(443) 203- West River, MDVerizon Maryland
(443) 204- Pikesville, MDNew Cingular Wireless PCS - DC
(443) 205- Cambridge, MDSprint Spectrum L.P.
(443) 206- Perryville, MDCellco Partnership DBA Verizon
(443) 207- Elkton, MDOmnipoint Communications Enterprises, L.P.
(443) 208- Essex, MDSprint Spectrum L.P.
(443) 209- Havre De Grace, MDCavalier Telephone (Mid-Atlantic)
(443) 210- Aberdeen, MDSprint Spectrum L.P.
(443) 212- Sparks Glencoe, MDUS LEC of Maryland
(443) 213- Baltimore, MDVerizon Maryland
(443) 214- Annapolis, MDNew Cingular Wireless PCS - DC
(443) 215- Chestertown, MDCore Communications
(443) 216- Dundalk, MDCavalier Telephone Mid-Atlantic
(443) 217- Annapolis, MDCore Communications
(443) 218- Reisterstown, MDGlobal Crossing Local Services - MD
(443) 219- Baltimore, MDLevel 3 Communications
(443) 220- Baltimore, MDVerizon Maryland
(443) 221- Annapolis, MDLevel 3 Communications
(443) 222- Reisterstown, MDXO Communications Maryland
(443) 223- Annapolis, MDCellco Partnership DBA Verizon
(443) 224- Baltimore, MDMCI Worldcom Communications
(443) 225- Cambridge, MDSprint Spectrum L.P.
(443) 226- Baltimore, MDSprint Spectrum L.P.
(443) 227- Port Deposit, MDCTC Communications Corp.
(443) 228- Middle River, MDUS LEC of Maryland
(443) 229- Severna Park, MDCavalier Telephone Mid-Atlantic
(443) 230- Odenton, MDCTC Communications Corp.
(443) 231- Baltimore, MDAT&T Local
(443) 232- Willards, MDCavalier Telephone (Mid-Atlantic)
(443) 233- Mardela Springs, MDCavalier Telephone (Mid-Atlantic)
(443) 234- Snow Hill, MDCavalier Telephone (Mid-Atlantic)
(443) 235- Salisbury, MDCellco Partnership DBA Verizon
(443) 236- Cardiff, MDCore Communications
(443) 237- North Beach, MDCore Communications
(443) 238- Parkton, MDCTC Communications Corp.
(443) 239- Easton, MDNew Cingular Wireless PCS - DC
(443) 240- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 241- Westminster, MDGlobal Naps South
(443) 242- Sparrows Point, MDCavalier Telephone Mid-Atlantic
(443) 243- Fallston, MDCellco Partnership DBA Verizon
(443) 244- Westminster, MDLevel 3 Communications
(443) 245- Elkton, MDCavalier Telephone (Mid-Atlantic)
(443) 246- Elkton, MDCore Communications
(443) 247- Union Bridge, MDCTC Communications Corp.
(443) 248- Catonsville, MDCellco Partnership DBA Verizon
(443) 249- Stevensville, MDVerizon Maryland
(443) 250- Baltimore, MDSprint Spectrum L.P.
(443) 251- Chestertown, MDLocal Access LLC
(443) 252- Perryville, MDCellco Partnership DBA Verizon
(443) 253- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 254- Annapolis, MDOmnipoint Communications Cap Operations
(443) 255- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 256- North East, MDCTC Communications Corp.
(443) 257- Baltimore, MDCellco Partnership DBA Verizon
(443) 258- Easton, MDNew Cingular Wireless PCS - DC
(443) 259- Columbia, MDVerizon Maryland
(443) 260- Salisbury, MDVerizon Maryland
(443) 261- Severna Park, MDMCI Worldcom Communications
(443) 262- Centreville, MDVerizon Maryland
(443) 263- Baltimore, MDVerizon Maryland
(443) 264- Pikesville, MDXO Communications Maryland
(443) 265- Fork, MDCavalier Telephone Mid-Atlantic
(443) 266- Glenwood, MDGlobal Crossing Local Services - MD
(443) 267- Darlington, MDTeleport Communications America
(443) 268- Baltimore, MDCore Communications
(443) 269- Towson, MDXO Communications Maryland
(443) 270- Baltimore, MDPaetec Communications
(443) 271- Baltimore, MDSprint Spectrum L.P.
(443) 272- Baltimore, MDTeleport Communications America
(443) 273- Reisterstown, MDTeleport Communications America
(443) 274- Severn, MDVerizon Maryland
(443) 275- Baltimore, MDComcast Phone of Northern Maryland
(443) 276- Baltimore, MDAllegiance Telecom
(443) 277- Sykesville, MDSprint Spectrum L.P.
(443) 278- Baltimore, MDVdl DBA Global Telecom Brokers
(443) 279- Baltimore, MDAllegiance Telecom
(443) 280- Sykesville, MDNew Cingular Wireless PCS - DC
(443) 281- Baltimore, MDAllegiance Telecom
(443) 282- Chestertown, MDSprint Spectrum L.P.
(443) 283- Baltimore, MDPaetec Communications
(443) 284- Jessup, MDXO Communications Maryland
(443) 285- Columbia, MDVerizon Maryland
(443) 286- Baltimore, MDCellco Partnership DBA Verizon
(443) 287- Baltimore, MDVerizon Maryland
(443) 288- Baltimore, MDAllegiance Telecom
(443) 289- Westminster, MDMCI Worldcom Communications
(443) 290- Parkville, MDTW Telecom of Maryland LLC
(443) 291- Hampstead, MDGlobal Crossing Local Services - MD
(443) 292- Laurel, MDLevel 3 Communications
(443) 293- Westminster, MDGlobal Crossing Local Services - MD
(443) 294- West River, MDGlobal Crossing Local Services - MD
(443) 295- Prince Frederick, MDLevel 3 Communications
(443) 296- Baltimore, MDGlobal Crossing Local Services - MD
(443) 297- Arbutus, MDTeleport Communications America
(443) 298- Easton, MDNew Cingular Wireless PCS - DC
(443) 299- Fallston, MDGlobal Crossing Local Services - MD
(443) 300- Sykesville, MDBroadwing Communications. LLC
(443) 301- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 302- Crofton, MDGlobal Crossing Local Services - MD
(443) 303- Aberdeen, MDGlobal Crossing Local Services - MD
(443) 304- Baltimore, MDGlobal Crossing Local Services - MD
(443) 305- Baltimore, MDGlobal Crossing Local Services - MD
(443) 306- Baltimore, MDSprint Spectrum L.P.
(443) 307- Bel Air, MDGlobal Crossing Local Services - MD
(443) 308- Baltimore, MDAllegiance Telecom
(443) 309- Elkton, MDSprint Spectrum L.P.
(443) 310- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 312- Baltimore, MDGlobal Crossing Local Services - MD
(443) 313- Fork, MDGlobal Crossing Local Services - MD
(443) 314- Baltimore, MDSprint Spectrum L.P.
(443) 315- Baltimore, MDGlobal Crossing Local Services - MD
(443) 316- Baltimore, MDGlobal Crossing Local Services - MD
(443) 317- Baltimore, MDGlobal Crossing Local Services - MD
(443) 318- Cockeysville, MDCavalier Telephone (Mid-Atlantic)
(443) 319- Columbia, MDCavalier Telephone (Mid-Atlantic)
(443) 320- Baltimore, MDGlobal Crossing Local Services - MD
(443) 321- Annapolis, MDPaetec Communications
(443) 322- Towson, MDCavalier Telephone Mid-Atlantic
(443) 323- Rhodesdale, MDCavalier Telephone (Mid-Atlantic)
(443) 324- Baltimore, MDSprint Spectrum L.P.
(443) 325- Ellicott City, MDCavalier Telephone Mid-Atlantic
(443) 326- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 327- Aberdeen, MDCavalier Telephone Mid-Atlantic
(443) 328- Sykesville, MDCTC Communications Corp.
(443) 329- Jessup, MDGlobal Crossing Local Services - MD
(443) 330- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 331- Taneytown, MDCTC Communications Corp.
(443) 332- Crofton, MDCavalier Telephone Mid-Atlantic
(443) 333- Annapolis, MDLeap Wireless Intl DBA Cricket Comm
(443) 334- Towson, MDAllegiance Telecom
(443) 335- Brooklyn, MDXO Communications Maryland
(443) 336- Annapolis, MDSprint Spectrum L.P.
(443) 337- Sparrows Point, MDXO Communications Maryland
(443) 338- Sparks Glencoe, MDCTC Communications Corp.
(443) 339- Sherwood Forest, MDCTC Communications Corp.
(443) 340- Westminster, MDCellco Partnership DBA Verizon
(443) 341- Baltimore, MDLevel 3 Communications
(443) 342- Solomons, MDCTC Communications Corp.
(443) 343- Millersville, MDTeleport Communications America
(443) 344- Severna Park, MDCore Communications
(443) 345- Aberdeen, MDLevel 3 Communications
(443) 346- Severna Park, MDXO Communications Maryland
(443) 347- Cardiff, MDCTC Communications Corp.
(443) 348- Baltimore, MDTeleport Communications America
(443) 349- Westminster, MDCore Communications
(443) 350- Elkton, MDCellco Partnership DBA Verizon
(443) 351- Columbia, MDUS LEC of Maryland
(443) 352- Baltimore, MDAT&T Local
(443) 353- Cockeysville, MDVerizon Maryland
(443) 354- Baltimore, MDLevel 3 Communications
(443) 355- Baltimore, MDLevel 3 Communications
(443) 356- Bel Air, MDLevel 3 Communications
(443) 357- Pikesville, MDVerizon Maryland
(443) 358- Salisbury, MDYMAX Communications Corp.
(443) 359- Delmar, MDCellco Partnership DBA Verizon
(443) 360- Aberdeen, MDTeleport Communications America
(443) 361- Sykesville, MDCore Communications
(443) 362- Easton, MDOmnipoint Communications Cap Operations
(443) 363- Severn, MDXO Communications Maryland
(443) 364- Baltimore, MDTeleport Communications America
(443) 365- Salisbury, MDOmnipoint Communications Cap Operations
(443) 366- Salisbury, MDSprint Spectrum L.P.
(443) 367- Columbia, MDVerizon Maryland
(443) 368- Westminster, MDCore Communications
(443) 369- Bel Air, MDCore Communications
(443) 370- Annapolis, MDNew Cingular Wireless PCS - DC
(443) 371- Bel Air, MDBroadwing Communications. LLC
(443) 372- Edgewood, MDUS LEC of Maryland
(443) 373- Ocean City, MDSprint Spectrum L.P.
(443) 374- Aberdeen, MDCavalier Telephone (Mid-Atlantic)
(443) 375- Hampstead, MDSprint Spectrum L.P.
(443) 376- Baltimore, MDTeleport Communications America
(443) 377- Towson, MDCellco Partnership DBA Verizon
(443) 378- Baltimore, MDSprint Spectrum L.P.
(443) 379- Pikesville, MDComcast Phone of Northern Maryland
(443) 380- Baltimore, MDLevel 3 Communications
(443) 381- Reisterstown, MDXO Communications Maryland
(443) 382- Cambridge, MDCore Communications
(443) 383- Westminster, MDCTC Communications Corp.
(443) 384- Parkville, MDCavalier Telephone Mid-Atlantic
(443) 385- Easton, MDCore Communications
(443) 386- Baltimore, MDCellco Partnership DBA Verizon
(443) 387- Pocomoke, MDCore Communications
(443) 388- Baltimore, MDCellco Partnership DBA Verizon
(443) 389- Salisbury, MDCore Communications
(443) 390- Churchville, MDGlobal Crossing Local Services - MD
(443) 391- Baltimore, MDGlobal Crossing Local Services - MD
(443) 392- Baltimore, MDAT&T Local
(443) 393- Baltimore, MDGlobal Crossing Local Services - MD
(443) 394- Pikesville, MDVerizon Maryland
(443) 395- Aberdeen, MDVerizon Maryland
(443) 396- Odenton, MDGlobal Crossing Local Services - MD
(443) 397- Salisbury, MDCellco Partnership DBA Verizon
(443) 398- Sykesville, MDSprint Spectrum L.P.
(443) 399- Baltimore, MDGlobal Crossing Local Services - MD
(443) 400- Baltimore, MDXO Communications Maryland
(443) 401- Baltimore, MDCellco Partnership DBA Verizon
(443) 402- Edgewood, MDTeleport Communications America
(443) 403- Aberdeen, MDBroadwing Communications. LLC
(443) 404- Solomons, MDSprint Spectrum L.P.
(443) 405- Baltimore, MDGlobal Crossing Local Services - MD
(443) 406- Elkton, MDTeleport Communications America
(443) 407- Baltimore, MDAllegiance Telecom
(443) 408- Baltimore, MDXO Communications Maryland
(443) 409- Edgewood, MDCavalier Telephone Mid-Atlantic
(443) 410- Baltimore, MDCenturylink Communications LLC
(443) 412- Churchville, MDTeleport Communications America
(443) 413- Baltimore, MDSprint Spectrum L.P.
(443) 414- Baltimore, MDSprint Spectrum L.P.
(443) 415- Baltimore, MDSprint Spectrum L.P.
(443) 416- Baltimore, MDSprint Spectrum L.P.
(443) 417- Fallston, MDTeleport Communications America
(443) 418- Baltimore, MDSprint Spectrum L.P.
(443) 419- Glenwood, MDCavalier Telephone Mid-Atlantic
(443) 420- Baltimore, MDGlobal Crossing Local Services - MD
(443) 421- Fork, MDNew Cingular Wireless PCS - DC
(443) 422- Glen Burnie, MDLeap Wireless Intl DBA Cricket Comm
(443) 423- Baltimore, MDBroadwing Communications. LLC
(443) 424- Cardiff, MDTeleport Communications America
(443) 425- Baltimore, MDAT&T Local
(443) 426- Baltimore, MDPaetec Communications
(443) 427- Princess Anne, MDCore Communications
(443) 428- Cockeysville, MDCore Communications
(443) 429- Woodlawn, MDCavalier Telephone Mid-Atlantic
(443) 430- Baltimore, MDXO Communications Maryland
(443) 431- Randallstown, MDXO Communications Maryland
(443) 432- Prince Frederick, MDCTC Communications Corp.
(443) 433- Annapolis, MDXO Communications Maryland
(443) 434- Federalsburg, MDComcast Phone of Northern Maryland
(443) 435- Baltimore, MDSprint Spectrum L.P.
(443) 436- Woodlawn, MDVerizon Maryland
(443) 437- Pocomoke, MDTeleport Communications America
(443) 438- Baltimore, MDCellco Partnership DBA Verizon
(443) 439- Trappe, MDCellco Partnership DBA Verizon
(443) 440- Annapolis, MDVerizon Maryland
(443) 441- Glenwood, MDTeleport Communications America
(443) 442- Parkville, MDCavalier Telephone Mid-Atlantic
(443) 444- Baltimore, MDVerizon Maryland
(443) 445- Elkridge, MDVerizon Maryland
(443) 446- Queenstown, MDMCI Worldcom Communications
(443) 447- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 448- Denton, MDComcast Phone of Northern Maryland
(443) 449- Baltimore, MDBroadview Networks
(443) 450- Baltimore, MDLevel 3 Communications
(443) 451- Baltimore, MDPaetec Communications
(443) 452- Baltimore, MDUS LEC of Maryland
(443) 453- Baltimore, MDNeutral Tandem-maryland
(443) 454- Annapolis, MDOmnipoint Communications Cap Operations
(443) 455- Baltimore, MDVerizon Maryland
(443) 456- Edgewood, MDAT&T Local
(443) 457- Baltimore, MDTeleport Communications America
(443) 458- Annapolis, MDAllegiance Telecom
(443) 459- Baltimore, MDPaetec Communications
(443) 460- Baltimore, MDAllegiance Telecom
(443) 461- Parkville, MDUS LEC of Maryland
(443) 462- Baltimore, MDCellco Partnership DBA Verizon
(443) 463- Baltimore, MDSprint Spectrum L.P.
(443) 464- Churchville, MDBroadview Networks
(443) 465- Towson, MDCellco Partnership DBA Verizon
(443) 466- Elkton, MDSprint Spectrum L.P.
(443) 467- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 468- Baltimore, MDSprint Spectrum L.P.
(443) 469- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 470- Towson, MDUS LEC of Maryland
(443) 471- Columbia, MDUS LEC of Maryland
(443) 472- Baltimore, MDLevel 3 Communications
(443) 473- Baltimore, MDSprint Spectrum L.P.
(443) 474- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 475- Baltimore, MDMCI Worldcom Communications
(443) 476- Annapolis, MDVerizon Maryland
(443) 477- Cambridge, MDCellco Partnership DBA Verizon
(443) 478- Baltimore, MDCellco Partnership DBA Verizon
(443) 479- Laurel, MDVerizon Maryland
(443) 480- Chestertown, MDCellco Partnership DBA Verizon
(443) 481- Annapolis, MDUS LEC of Maryland
(443) 482- Annapolis, MDVerizon Maryland
(443) 483- Cardiff, MDBroadwing Communications. LLC
(443) 484- Edgewood, MDBroadwing Communications. LLC
(443) 485- Elkton, MDBroadwing Communications. LLC
(443) 486- Prince Frederick, MDBroadwing Communications. LLC
(443) 487- Westminster, MDBroadwing Communications. LLC
(443) 488- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 489- Baltimore, MDTeleport Communications America
(443) 490- Edgewood, MDGlobal Crossing Local Services - MD
(443) 491- Parkton, MDGlobal Crossing Local Services - MD
(443) 492- Baltimore, MDGlobal Crossing Local Services - MD
(443) 493- Delmar, MDCellco Partnership DBA Verizon
(443) 494- Millersville, MDGlobal Crossing Local Services - MD
(443) 495- Baltimore, MDGlobal Crossing Local Services - MD
(443) 496- Easton, MDSprint Spectrum L.P.
(443) 497- Salisbury, MDSprint Spectrum L.P.
(443) 498- Baltimore, MDAllegiance Telecom
(443) 499- Jarrettsville, MDGlobal Crossing Local Services - MD
(443) 500- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 501- Baltimore, MDGlobal Crossing Local Services - MD
(443) 502- Havre De Grace, MDTeleport Communications America
(443) 503- Baltimore, MDXO Communications Maryland
(443) 504- Fallston, MDCavalier Telephone Mid-Atlantic
(443) 505- Baltimore, MDGlobal Crossing Local Services - MD
(443) 506- Baltimore, MDSprint Spectrum L.P.
(443) 507- Hampstead, MDTeleport Communications America
(443) 508- Hampstead, MDCavalier Telephone Mid-Atlantic
(443) 509- Baltimore, MDCellco Partnership DBA Verizon
(443) 510- Annapolis, MDCellco Partnership DBA Verizon
(443) 512- Edgewood, MDVerizon Maryland
(443) 513- Berlin, MDNew Cingular Wireless PCS - DC
(443) 514- Columbia, MDUS LEC of Maryland
(443) 515- Cambridge, MDCellco Partnership DBA Verizon
(443) 516- Sykesville, MDGlobal Crossing Local Services - MD
(443) 517- Baltimore, MDGlobal Crossing Local Services - MD
(443) 518- Columbia, MDVerizon Maryland
(443) 519- Baltimore, MDGlobal Crossing Local Services - MD
(443) 520- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 521- Cambridge, MDCellco Partnership DBA Verizon
(443) 522- Reisterstown, MDPaetec Communications
(443) 523- Salisbury, MDVerizon Maryland
(443) 524- Baltimore, MDAllegiance Telecom
(443) 525- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 526- Havre De Grace, MDCTC Communications Corp.
(443) 527- Baltimore, MDOmnipoint Communications Cap Operations
(443) 528- Bel Air, MDSprint Spectrum L.P.
(443) 529- Baltimore, MDOmnipoint Communications Cap Operations
(443) 530- Baltimore, MDPaetec Communications
(443) 531- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 532- Prince Frederick, MDSprint Spectrum L.P.
(443) 533- Jarrettsville, MDTeleport Communications America
(443) 534- Annapolis, MDCellco Partnership DBA Verizon
(443) 535- Columbia, MDVerizon Maryland
(443) 536- Westminster, MDSprint Spectrum L.P.
(443) 537- Columbia, MDVerizon Maryland
(443) 538- Columbia, MDOmnipoint Communications Cap Operations
(443) 539- Columbia, MDUS LEC of Maryland
(443) 540- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 541- Baltimore, MDPaetec Communications
(443) 542- Columbia, MDComcast Phone of Northern Maryland
(443) 543- Arbutus, MDVerizon Maryland
(443) 544- Pikesville, MDCavalier Telephone Mid-Atlantic
(443) 545- Columbia, MDBroadwing Communications. LLC
(443) 546- Baltimore, MDVerizon Maryland
(443) 547- Westminster, MDCellco Partnership DBA Verizon
(443) 548- Baltimore, MDAllegiance Telecom
(443) 549- Dundalk, MDUS LEC of Maryland
(443) 550- North Beach, MDLevel 3 Communications
(443) 551- Baltimore, MDLevel 3 Communications
(443) 552- Baltimore, MDVerizon Maryland
(443) 553- Elkton, MDCellco Partnership DBA Verizon
(443) 554- Middle River, MDOmnipoint Communications Cap Operations
(443) 556- Cockeysville, MDVerizon Maryland
(443) 557- Baltimore, MDAllegiance Telecom
(443) 558- Aberdeen, MDXO Communications Maryland
(443) 559- Essex, MDComcast Phone of Northern Maryland
(443) 560- Baltimore, MDSprint Spectrum L.P.
(443) 561- Columbia, MDUS LEC of Maryland
(443) 562- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 563- Baltimore, MDSprint Spectrum L.P.
(443) 564- Baltimore, MDLevel 3 Communications
(443) 565- Randallstown, MDCavalier Telephone Mid-Atlantic
(443) 566- Chesapeake City, MDCellco Partnership DBA Verizon
(443) 567- Bel Air, MDLevel 3 Communications
(443) 568- Arbutus, MDAllegiance Telecom
(443) 569- Annapolis, MDLevel 3 Communications
(443) 570- Baltimore, MDOmnipoint Communications Cap Operations
(443) 571- Baltimore, MDCellco Partnership DBA Verizon
(443) 572- Glen Burnie, MDVerizon Maryland
(443) 573- Columbia, MDUS LEC of Maryland
(443) 574- Ellicott City, MDUS LEC of Maryland
(443) 575- Arbutus, MDCavalier Telephone Mid-Atlantic
(443) 576- Baltimore, MDAllegiance Telecom
(443) 577- Columbia, MDUS LEC of Maryland
(443) 578- Baltimore, MDXO Communications Maryland
(443) 579- Essex, MDUS LEC of Maryland
(443) 580- Baltimore, MDSprint Spectrum L.P.
(443) 581- Middle River, MDXO Communications Maryland
(443) 582- Churchville, MDCTC Communications Corp.
(443) 583- Columbia, MDCTC Communications Corp.
(443) 584- Crofton, MDCTC Communications Corp.
(443) 585- Darlington, MDCTC Communications Corp.
(443) 586- Dundalk, MDXO Communications Maryland
(443) 587- Edgewood, MDCTC Communications Corp.
(443) 588- Baltimore, MDAllegiance Telecom
(443) 589- Cockeysville, MDUS LEC of Maryland
(443) 590- Reisterstown, MDGlobal Crossing Local Services - MD
(443) 591- Glen Burnie, MDCellco Partnership DBA Verizon
(443) 592- Elkridge, MDXO Communications Maryland
(443) 593- Elkton, MDCTC Communications Corp.
(443) 594- Baltimore, MDGlobal Crossing Local Services - MD
(443) 595- Sparks Glencoe, MDGlobal Crossing Local Services - MD
(443) 596- Essex, MDXO Communications Maryland
(443) 597- Severna Park, MDGlobal Crossing Local Services - MD
(443) 598- Sherwood Forest, MDGlobal Crossing Local Services - MD
(443) 599- Baltimore, MDGlobal Crossing Local Services - MD
(443) 600- Essex, MDOmnipoint Communications Cap Operations
(443) 601- Fallston, MDCTC Communications Corp.
(443) 602- Catonsville, MDCellco Partnership DBA Verizon
(443) 603- Annapolis, MDPaetec Communications
(443) 604- Baltimore, MDCellco Partnership DBA Verizon
(443) 605- Westminster, MDCavalier Telephone Mid-Atlantic
(443) 606- Fork, MDCTC Communications Corp.
(443) 607- West River, MDCavalier Telephone Mid-Atlantic
(443) 608- Towson, MDLeap Wireless Intl DBA Cricket Comm
(443) 609- Sykesville, MDCavalier Telephone Mid-Atlantic
(443) 610- Baltimore, MDCellco Partnership DBA Verizon
(443) 612- Catonsville, MDVerizon Maryland
(443) 613- Towson, MDLeap Wireless Intl DBA Cricket Comm
(443) 614- Salisbury, MDCellco Partnership DBA Verizon
(443) 615- Catonsville, MDCellco Partnership DBA Verizon
(443) 616- Bel Air, MDCavalier Telephone Mid-Atlantic
(443) 617- Fallston, MDCellco Partnership DBA Verizon
(443) 618- Glen Burnie, MDCellco Partnership DBA Verizon
(443) 619- Bel Air, MDCellco Partnership DBA Verizon
(443) 620- Baltimore, MDTeleport Communications America
(443) 621- Baltimore, MDSprint Spectrum L.P.
(443) 622- Baltimore, MDSprint Spectrum L.P.
(443) 623- Glen Burnie, MDSprint Spectrum L.P.
(443) 624- Prince Frederick, MDCellco Partnership DBA Verizon
(443) 625- Fork, MDBroadwing Communications. LLC
(443) 626- Middle River, MDCavalier Telephone Mid-Atlantic
(443) 627- Baltimore, MDVerizon Maryland
(443) 628- Glen Burnie, MDXO Communications Maryland
(443) 629- Baltimore, MDSprint Spectrum L.P.
(443) 630- Baltimore, MDCellco Partnership DBA Verizon
(443) 631- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 632- Towson, MDUS LEC of Maryland
(443) 633- Baltimore, MDSprint Spectrum L.P.
(443) 634- Odenton, MDVerizon Maryland
(443) 635- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 636- Catonsville, MDOmnipoint Communications Cap Operations
(443) 637- Baltimore, MDXO Communications Maryland
(443) 638- Ellicott City, MDGlobal Naps South
(443) 639- Hampstead, MDCTC Communications Corp.
(443) 640- Bel Air, MDUS LEC of Maryland
(443) 641- Pikesville, MDBroadwing Communications. LLC
(443) 642- Baltimore, MDCellco Partnership DBA Verizon
(443) 643- Bel Air, MDVerizon Maryland
(443) 644- Jarrettsville, MDCTC Communications Corp.
(443) 645- Millersville, MDCTC Communications Corp.
(443) 646- North Beach, MDCTC Communications Corp.
(443) 647- New Windsor, MDCTC Communications Corp.
(443) 648- Baltimore, MDTeleport Communications America
(443) 649- Sparrows Point, MDUS LEC of Maryland
(443) 650- Reisterstown, MDAllegiance Telecom
(443) 651- Baltimore, MDCellco Partnership DBA Verizon
(443) 652- Towson, MDVerizon Maryland
(443) 653- Baltimore, MDOmnipoint Communications Cap Operations
(443) 654- Jessup, MDVerizon Maryland
(443) 655- Bel Air, MDNew Cingular Wireless PCS - DC
(443) 656- Columbia, MDCavalier Telephone Mid-Atlantic
(443) 657- Randallstown, MDTW Telecom of Maryland LLC
(443) 658- Woodlawn, MDGlobal Naps South
(443) 659- West River, MDGlobal Naps South
(443) 660- Baltimore, MDComcast Phone of Northern Maryland
(443) 661- Jessup, MDCavalier Telephone Mid-Atlantic
(443) 662- Sparks Glencoe, MDCavalier Telephone Mid-Atlantic
(443) 663- Woodlawn, MDVerizon Maryland
(443) 664- Ocean City, MDCavalier Telephone (Mid-Atlantic)
(443) 665- Nanticoke, MDCavalier Telephone (Mid-Atlantic)
(443) 666- Chestertown, MDLevel 3 Communications
(443) 668- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 669- Delmar, MDCavalier Telephone (Mid-Atlantic)
(443) 670- Catonsville, MDCavalier Telephone Mid-Atlantic
(443) 671- New Windsor, MDTeleport Communications America
(443) 672- Parkton, MDTeleport Communications America
(443) 673- Brooklyn, MDCavalier Telephone Mid-Atlantic
(443) 674- North East, MDTeleport Communications America
(443) 675- Randallstown, MDCavalier Telephone (Mid-Atlantic)
(443) 676- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 677- Baltimore, MDSprint Spectrum L.P.
(443) 678- Parkville, MDVerizon Maryland
(443) 679- Baltimore, MDTeleport Communications America
(443) 680- Baltimore, MDSprint Spectrum L.P.
(443) 681- Baltimore, MDCellco Partnership DBA Verizon
(443) 682- Baltimore, MDCellco Partnership DBA Verizon
(443) 683- Baltimore, MDCellco Partnership DBA Verizon
(443) 684- Prince Frederick, MDCellco Partnership DBA Verizon
(443) 685- Severn, MDCavalier Telephone (Mid-Atlantic)
(443) 686- Fallston, MDSprint Spectrum L.P.
(443) 687- Baltimore, MDCellco Partnership DBA Verizon
(443) 688- Severn, MDCavalier Telephone Mid-Atlantic
(443) 689- Cockeysville, MDCavalier Telephone Mid-Atlantic
(443) 690- Baltimore, MDCellco Partnership DBA Verizon
(443) 691- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 692- Baltimore, MDAllegiance Telecom
(443) 693- Perryville, MDTeleport Communications America
(443) 694- Severna Park, MDSprint Spectrum L.P.
(443) 695- Baltimore, MDCellco Partnership DBA Verizon
(443) 696- Dundalk, MDCavalier Telephone Mid-Atlantic
(443) 697- Catonsville, MDGlobal Naps South
(443) 698- Odenton, MDTeleport Communications America
(443) 699- Annapolis, MDCellco Partnership DBA Verizon
(443) 701- Arbutus, MDXO Communications Maryland
(443) 702- Pasadena, MDCavalier Telephone Mid-Atlantic
(443) 703- Baltimore, MDXO Communications Maryland
(443) 704- Odenton, MDCavalier Telephone Mid-Atlantic
(443) 705- Cockeysville, MDXO Communications Maryland
(443) 706- Crisfield, MDCavalier Telephone (Mid-Atlantic)
(443) 708- Baltimore, MDTW Telecom of Maryland LLC
(443) 709- Arbutus, MDCavalier Telephone Mid-Atlantic
(443) 710- Baltimore, MDXO Communications Maryland
(443) 712- Reisterstown, MDCavalier Telephone Mid-Atlantic
(443) 713- Columbia, MDPeerless Network of Maryland
(443) 714- Columbia, MDSprint Spectrum L.P.
(443) 715- North East, MDCavalier Telephone (Mid-Atlantic)
(443) 716- Annapolis, MDCavalier Telephone Mid-Atlantic
(443) 717- Baltimore, MDCellco Partnership DBA Verizon
(443) 718- Columbia, MDUS LEC of Maryland
(443) 719- Jarrettsville, MDCavalier Telephone Mid-Atlantic
(443) 720- Elkton, MDXO Communications Maryland
(443) 721- Baltimore, MDCellco Partnership DBA Verizon
(443) 722- Baltimore, MDOmnipoint Communications Cap Operations
(443) 723- Brooklyn, MDSprint Spectrum L.P.
(443) 724- Easton, MDCavalier Telephone (Mid-Atlantic)
(443) 725- Baltimore, MDPaetec Communications
(443) 726- Towson, MDSprint Spectrum L.P.
(443) 727- Bishopville, MDCavalier Telephone (Mid-Atlantic)
(443) 728- Berlin, MDCavalier Telephone (Mid-Atlantic)
(443) 729- Baltimore, MDPaetec Communications
(443) 730- Baltimore, MDPaetec Communications
(443) 731- Port Deposit, MDTeleport Communications America
(443) 732- Westminster, MDTeleport Communications America
(443) 733- Baltimore, MDAT&T Local
(443) 734- Severn, MDVerizon Maryland
(443) 735- Salisbury, MDNew Cingular Wireless PCS - DC
(443) 736- Salisbury, MDNew Cingular Wireless PCS - DC
(443) 737- Baltimore, MDPaetec Communications
(443) 738- Baltimore, MDPaetec Communications
(443) 739- Baltimore, MDOmnipoint Communications Cap Operations
(443) 740- Baltimore, MDTelcove Operations
(443) 741- Columbia, MDMCI Worldcom Communications
(443) 742- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 743- Baltimore, MDCellco Partnership DBA Verizon
(443) 744- Reisterstown, MDSprint Spectrum L.P.
(443) 745- Columbia, MDCellco Partnership DBA Verizon
(443) 746- Easton, MDLevel 3 Communications
(443) 747- Port Deposit, MDCore Communications
(443) 748- Millersville, MDCavalier Telephone Mid-Atlantic
(443) 749- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 750- Baltimore, MDCellco Partnership DBA Verizon
(443) 751- Woodlawn, MDCavalier Telephone Mid-Atlantic
(443) 752- Bel Air, MDCellco Partnership DBA Verizon
(443) 753- Jessup, MDAllegiance Telecom
(443) 754- Salisbury, MDCellco Partnership DBA Verizon
(443) 755- Elkridge, MDVerizon Maryland
(443) 756- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 757- Elkridge, MDCavalier Telephone Mid-Atlantic
(443) 758- Annapolis, MDAT&T Local
(443) 759- Baltimore, MDCellco Partnership DBA Verizon
(443) 760- Aberdeen, MDAT&T Local
(443) 761- Towson, MDOmnipoint Communications Cap Operations
(443) 762- Baltimore, MDSprint Spectrum L.P.
(443) 763- Baltimore, MDOmnipoint Communications Cap Operations
(443) 764- Glen Burnie, MDOmnipoint Communications Cap Operations
(443) 765- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 766- Columbia, MDUS LEC of Maryland
(443) 767- Reisterstown, MDCavalier Telephone Mid-Atlantic
(443) 768- Baltimore, MDSprint Spectrum L.P.
(443) 769- Baltimore, MDOmnipoint Communications Cap Operations
(443) 770- Pasadena, MDVerizon Maryland
(443) 771- Prince Frederick, MDCellco Partnership DBA Verizon
(443) 772- Essex, MDCavalier Telephone Mid-Atlantic
(443) 773- Baltimore, MDAllegiance Telecom
(443) 774- Baltimore, MDGlobal Naps South
(443) 776- Baltimore, MDBandwidth.com - CLEC
(443) 777- Essex, MDVerizon Maryland
(443) 778- Laurel, MDVerizon Maryland
(443) 779- Aberdeen, MDXO Communications Maryland
(443) 780- Columbia, MDUS LEC of Maryland
(443) 781- Pasadena, MDXO Communications Maryland
(443) 782- Annapolis, MDXO Communications Maryland
(443) 783- Salisbury, MDCellco Partnership DBA Verizon
(443) 784- Baltimore, MDTeleport Communications America
(443) 785- Arbutus, MDGlobal Naps South
(443) 786- Easton, MDCellco Partnership DBA Verizon
(443) 787- Bel Air, MDCTC Communications Corp.
(443) 788- Aberdeen, MDXO Communications Maryland
(443) 789- Westminster, MDNew Cingular Wireless PCS - DC
(443) 790- Glen Burnie, MDSprint Spectrum L.P.
(443) 791- Towson, MDNew Cingular Wireless PCS - DC
(443) 792- Brooklyn, MDVerizon Maryland
(443) 793- Baltimore, MDXO Communications Maryland
(443) 794- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 795- Baltimore, MDXO Communications Maryland
(443) 796- Baltimore, MDXO Communications Maryland
(443) 797- Baltimore, MDXO Communications Maryland
(443) 798- Towson, MDTW Telecom of Maryland LLC
(443) 799- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 800- Baltimore, MDSprint Spectrum L.P.
(443) 801- Baltimore, MDSprint Spectrum L.P.
(443) 802- Baltimore, MDSprint Spectrum L.P.
(443) 803- Baltimore, MDSprint Spectrum L.P.
(443) 804- Baltimore, MDSprint Spectrum L.P.
(443) 805- Glen Burnie, MDOmnipoint Communications Cap Operations
(443) 806- Baltimore, MDSprint Spectrum L.P.
(443) 807- Fallston, MDSprint Spectrum L.P.
(443) 808- Annapolis, MDBandwidth.com - CLEC
(443) 810- Baltimore, MDSprint Spectrum L.P.
(443) 812- Columbia, MDCellco Partnership DBA Verizon
(443) 813- Baltimore, MDCellco Partnership DBA Verizon
(443) 814- Baltimore, MDCellco Partnership DBA Verizon
(443) 815- Baltimore, MDXO Communications Maryland
(443) 816- Severna Park, MDAllegiance Telecom
(443) 817- Baltimore, MDAllegiance Telecom
(443) 818- Pasadena, MDLevel 3 Communications
(443) 820- Baltimore, MDPaetec Communications
(443) 821- Westminster, MDSprint Spectrum L.P.
(443) 822- Annapolis, MDSprint Spectrum L.P.
(443) 823- Towson, MDCellco Partnership DBA Verizon
(443) 824- Towson, MDOmnipoint Communications Cap Operations
(443) 825- Baltimore, MDOmnipoint Communications Cap Operations
(443) 826- Baltimore, MDCellco Partnership DBA Verizon
(443) 827- Baltimore, MDCellco Partnership DBA Verizon
(443) 828- Ellicott City, MDCavalier Telephone Mid-Atlantic
(443) 829- Baltimore, MDSprint Spectrum L.P.
(443) 830- Catonsville, MDCavalier Telephone Mid-Atlantic
(443) 831- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 832- Baltimore, MDLevel 3 Communications
(443) 833- Arbutus, MDUS LEC of Maryland
(443) 834- Towson, MDCavalier Telephone Mid-Atlantic
(443) 835- Baltimore, MDCellco Partnership DBA Verizon
(443) 836- Baltimore, MDXO Communications Maryland
(443) 837- Annapolis, MDUS LEC of Maryland
(443) 838- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 839- Baltimore, MDOmnipoint Communications Cap Operations
(443) 840- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 841- Baltimore, MDVerizon Maryland
(443) 842- Baltimore, MDCellco Partnership DBA Verizon
(443) 843- Havre De Grace, MDVerizon Maryland
(443) 844- Baltimore, MDCellco Partnership DBA Verizon
(443) 845- Baltimore, MDCellco Partnership DBA Verizon
(443) 846- Towson, MDNew Cingular Wireless PCS - DC
(443) 847- Towson, MDCellco Partnership DBA Verizon
(443) 848- Baltimore, MDSprint Spectrum L.P.
(443) 849- Towson, MDVerizon Maryland
(443) 850- Baltimore, MDOmnipoint Communications Cap Operations
(443) 851- Catonsville, MDOmnipoint Communications Cap Operations
(443) 852- Annapolis, MDNew Cingular Wireless PCS - DC
(443) 853- Baltimore, MDCellco Partnership DBA Verizon
(443) 854- Baltimore, MDOmnipoint Communications Cap Operations
(443) 855- Aberdeen, MDLightwave Communications
(443) 856- Ocean City, MDCore Communications
(443) 857- Baltimore, MDOmnipoint Communications Cap Operations
(443) 858- Baltimore, MDOmnipoint Communications Cap Operations
(443) 859- Salisbury, MDOmnipoint Communications Cap Operations
(443) 860- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 861- Aberdeen, MDVerizon Maryland
(443) 862- Towson, MDCellco Partnership DBA Verizon
(443) 863- Baltimore, MDCellco Partnership DBA Verizon
(443) 864- Columbia, MDSprint Spectrum L.P.
(443) 865- Baltimore, MDSprint Spectrum L.P.
(443) 866- Bel Air, MDSprint Spectrum L.P.
(443) 867- Glen Burnie, MDPaetec Communications
(443) 868- Baltimore, MDVerizon Maryland
(443) 869- Baltimore, MDCellco Partnership DBA Verizon
(443) 870- Pikesville, MDTW Telecom of Maryland LLC
(443) 871- Annapolis, MDSprint Spectrum L.P.
(443) 872- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 873- Pikesville, MDBroadvox - CLEC
(443) 874- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 875- Annapolis, MDNew Cingular Wireless PCS - DC
(443) 876- Bel Air, MDSprint Spectrum L.P.
(443) 877- North East, MDLevel 3 Communications
(443) 878- Baltimore, MDCellco Partnership DBA Verizon
(443) 879- Baltimore, MDVerizon Maryland
(443) 880- Salisbury, MDAT&T Local
(443) 881- Reisterstown, MDSprint Spectrum L.P.
(443) 882- Baltimore, MDSprint Spectrum L.P.
(443) 883- Baltimore, MDAT&T Local
(443) 884- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 885- Baltimore, MDVerizon Maryland
(443) 886- Baltimore, MDAT&T Local
(443) 887- Harmans, MDCavalier Telephone Mid-Atlantic
(443) 888- Princess Anne, MDCavalier Telephone (Mid-Atlantic)
(443) 889- Glen Burnie, MDOmnipoint Communications Cap Operations
(443) 890- Baltimore, MDCellco Partnership DBA Verizon
(443) 891- Baltimore, MDXO Communications Maryland
(443) 892- New Windsor, MDBandwidth.com - CLEC
(443) 893- Baltimore, MDXO Communications Maryland
(443) 894- Baltimore, MDSprint Spectrum L.P.
(443) 895- Towson, MDCellco Partnership DBA Verizon
(443) 896- Baltimore, MDAT&T Local
(443) 897- Baltimore, MDLeap Wireless Intl DBA Cricket Comm
(443) 898- Pikesville, MDLevel 3 Communications
(443) 899- Elkridge, MDBroadwing Communications. LLC
(443) 900- Towson, MDCellco Partnership DBA Verizon
(443) 901- Towson, MDCavalier Telephone Mid-Atlantic
(443) 902- Baltimore, MDCellco Partnership DBA Verizon
(443) 903- Bel Air, MDCellco Partnership DBA Verizon
(443) 904- Baltimore, MDCellco Partnership DBA Verizon
(443) 905- Annapolis, MDSprint Spectrum L.P.
(443) 906- Severna Park, MDPeerless Network of Maryland
(443) 907- Elkton, MDCellco Partnership DBA Verizon
(443) 908- Baltimore, MDCellco Partnership DBA Verizon
(443) 909- Baltimore, MDCellco Partnership DBA Verizon
(443) 910- Bel Air, MDNew Cingular Wireless PCS - DC
(443) 912- Towson, MDCore Communications
(443) 913- Baltimore, MDSprint Spectrum L.P.
(443) 914- Reisterstown, MDTeleport Communications America
(443) 915- Baltimore, MDCellco Partnership DBA Verizon
(443) 916- Baltimore, MDSprint Spectrum L.P.
(443) 917- Columbia, MDBroadvox - CLEC
(443) 918- Taneytown, MDTeleport Communications America
(443) 919- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 920- Sykesville, MDTeleport Communications America
(443) 921- Baltimore, MDPaetec Communications
(443) 922- Edgewood, MDAtx Telecommunications Services, LTD
(443) 923- Baltimore, MDCavalier Telephone Mid-Atlantic
(443) 924- Annapolis, MDCellco Partnership DBA Verizon
(443) 925- Baltimore, MDOmnipoint Communications Cap Operations
(443) 926- Annapolis, MDBroadwing Communications. LLC
(443) 927- Baltimore, MDBroadwing Communications. LLC
(443) 928- Baltimore, MDCellco Partnership DBA Verizon
(443) 929- Pikesville, MDOmnipoint Communications Cap Operations
(443) 930- Baltimore, MDCellco Partnership DBA Verizon
(443) 931- Baltimore, MDMCI Worldcom Communications
(443) 932- Baltimore, MDSprint Spectrum L.P.
(443) 933- Cockeysville, MDTeleport Communications America
(443) 934- Baltimore, MDCellco Partnership DBA Verizon
(443) 935- Towson, MDNew Cingular Wireless PCS - DC
(443) 937- Union Bridge, MDTeleport Communications America
(443) 938- Baltimore, MDCellco Partnership DBA Verizon
(443) 939- Baltimore, MDOmnipoint Communications Cap Operations
(443) 940- Pikesville, MDCavalier Telephone Mid-Atlantic
(443) 941- Elkton, MDNew Cingular Wireless PCS - DC
(443) 942- Severna Park, MDTeleport Communications America
(443) 943- Baltimore, MDTeleport Communications America
(443) 944- Salisbury, MDComcast Phone of Northern Maryland
(443) 945- Elkton, MDNew Cingular Wireless PCS - DC
(443) 946- Parkville, MDXO Communications Maryland
(443) 947- Perryville, MDCTC Communications Corp.
(443) 948- Baltimore, MDSprint Spectrum L.P.
(443) 949- Annapolis, MDComcast Phone of Northern Maryland
(443) 951- Annapolis, MDGlobal Crossing Local Services - MD
(443) 952- Westminster, MDCellco Partnership DBA Verizon
(443) 953- Salisbury, MDCellco Partnership DBA Verizon
(443) 954- Baltimore, MDPaetec Communications
(443) 955- Baltimore, MDCellco Partnership DBA Verizon
(443) 956- Baltimore, MDNew Cingular Wireless PCS - DC
(443) 957- Baltimore, MDAT&T Local
(443) 960- Glen Burnie, MDCellco Partnership DBA Verizon
(443) 962- Glen Burnie, MDCellco Partnership DBA Verizon
(443) 963- Baltimore, MDHalo Wireless Services
(443) 964- North Beach, MDLevel 3 Communications
(443) 965- Baltimore, MDSprint Spectrum L.P.
(443) 966- Fallston, MDCellco Partnership DBA Verizon
(443) 967- North East, MDVerizon Maryland
(443) 968- Prince Frederick, MDNew Cingular Wireless PCS - DC
(443) 969- Essex, MDCavalier Telephone Mid-Atlantic
(443) 970- Baltimore, MDCellco Partnership DBA Verizon
(443) 971- Taneytown, MDBandwidth.com - CLEC
(443) 972- Cambridge, MDUS LEC of Maryland
(443) 973- Baltimore, MDXO Communications Maryland
(443) 974- Westminster, MDTeleport Communications America
(443) 975- Prince Frederick, MDNew Cingular Wireless PCS - DC
(443) 977- Baltimore, MDCellco Partnership DBA Verizon
(443) 978- Salisbury, MDCellco Partnership DBA Verizon
(443) 979- Columbia, MDCellco Partnership DBA Verizon
(443) 980- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 981- Fallston, MDCellco Partnership DBA Verizon
(443) 982- Baltimore, MDYMAX Communications Corp.
(443) 983- Baltimore, MDOmnipoint Communications Cap Operations
(443) 984- Baltimore, MDVerizon Maryland
(443) 985- Randallstown, MDOmnipoint Communications Cap Operations
(443) 986- Baltimore, MDCellco Partnership DBA Verizon
(443) 987- Bel Air, MDAT&T Local
(443) 988- Centreville, MDLevel 3 Communications
(443) 989- Glen Burnie, MDCavalier Telephone Mid-Atlantic
(443) 990- Baltimore, MDBandwidth.com - CLEC
(443) 991- Towson, MDCellco Partnership DBA Verizon
(443) 992- Baltimore, MDLevel 3 Communications
(443) 993- Elkton, MDMetro PCS
(443) 994- Annapolis, MDNew Cingular Wireless PCS - DC
(443) 995- Annapolis, MDNew Cingular Wireless PCS - DC
(443) 996- Catonsville, MDNew Cingular Wireless PCS - DC
(443) 997- Baltimore, MDVerizon Maryland
(443) 998- Parkville, MDVerizon Maryland