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Area Code — 443

Rate centers:

WOODLAWN , WEST RIVER , PIKESVILLE , CAMBRIDGE , PERRYVILLE , ELKTON , BALTIMORE , HAVREGRACE , SALISBURY , SPARKSGLNC , ANNAPOLIS , CHESTERTN , DUNDALK , WORTHINGTN , PARKVILLE , PT DEPOSIT , CHASE , SEVERNA PK , ODENTON , ESSEX , WILLARDS , VIENNA , SNOW HILL , CARDIFF , NORTHBEACH , PARKTON , EASTON , WESTMINSTR , SPARROWSPT , FALLSTON , UNION BDG , STEVENSVL , NORTH EAST , COLUMBIA , CENTREVL , FORK , GLENWOOD , DARLINGTON , TOWSON , GLENBURNIE , RANDALLSTN , REISTERSTN , SEVERN , SYKESVILLE , COCKEYSVL , WATERLO238 , ELLICOTTCY , HAMPSTEAD , CROFTON , PRINCEFRCK , ARBUTUS , ABERDEEN , ARGRGBSNIS , BEL AIR , BRYNPKLNCM , CATONSVL , SHARPTOWN , WATERLO236 , TANEYTOWN , SHERWD FOR , SOLOMONS , MILLERSVL , SILVER RUN , DELMAR , EDGEWOOD , OCEAN CITY , POCOMOKE , CHURCHVL , PRINCEANNE , FEDERALSBG , TRAPPE , ELKRIDGE , QUEENSTOWN , DENTON , JARRETTSVL , BERLIN , CHESAPKECY , NEWWINDSOR , NANTICOKE , CRISFIELD , BISHOPVL

Companies:

ALLEGIANCE TELECOM, INC. , COMCAST PHONE OF NORTHERN MARYLAND, INC. , TELCOVE OPERATIONS, INC. , VERIZON MARYLAND, INC. , LEVEL 3 COMMUNICATIONS, LLC , XO MARYLAND, LLC , NATIONSLINE, INC. , BANDWIDTH.COM CLEC, LLC , NEW CINGULAR WIRELESS PCS, LLC - DC , NEXTEL COMMUNICATIONS, INC. , CELLCO PARTNERSHIP DBA VERIZON WIRELESS , CORE COMMUNICATIONS, INC. , OMNIPOINT COMMUNICATIONS ENTERPRISES, L.P. , SPRINT SPECTRUM L.P. , CAVALIER TELEPHONE, LLC (MID-ATLANTIC) , LIGHTWAVE COMMUNICATIONS, LLC , MCI WORLDCOM COMMUNICATIONS, INC. , US LEC OF MARYLAND, INC. , PAETEC COMMUNICATIONS, INC. , BROADWING COMMUNICATIONS. LLC , CAVALIER TELEPHONE MID-ATLANTIC, LLC , GLOBAL CROSSING LOCAL SERVICES, INC. , OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC , LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC. , GLOBAL NAPS SOUTH, INC. , YMAX COMMUNICATIONS CORP. , AT&T LOCAL , CTC COMMUNICATIONS CORP. , SPRINT COMMUNICATIONS COMPANY, L.P. , VDL, INC. DBA GLOBAL TELECOM BROKERS , IDT AMERICA CORP , ATX TELECOMMUNICATIONS SERVICES, LTD , TELEPORT COMMUNICATIONS GROUP AMERICA, INC. , TW TELECOM OF MARYLAND LLC , BROADVIEW NETWORKS, INC. , ARMSTRONG TELECOMMUNICATIONS, INC. , MCIMETRO ACCESS TRANSMISSION SERVICES LLC , NEUTRAL TANDEM-MARYLAND, LLC , QUANTUM TELECOMMUNICATIONS, INC. , MCC TELEPHONY OF THE MID-ATLANTIC, LLC , BALTIMORE-WASHINGTON TELEPHONE BWT , GLOBAL NAPS, INC. - NY , INFOTELECOM, LLC , GLOBAL NAPS, INC.-MA , METRO PCS, INC.

List of 443 Area-Code Phone Number Prefixes