The 443 area code is a telephone area code serving the eastern half of Maryland, including the Baltimore metropolitan area and the Eastern Shore. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 443 area code) below and access available caller information such as name, address, and more.
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Area code 443 covers the eastern half of Maryland, encompassing both the Baltimore metropolitan area and the Eastern Shore region.
Area code 443 is an overlay to area code 410, covering the same geographic region. Area code 410 was introduced in 1991, and area code 443 was added in 1997. Area code 667 was later added as another overlay. Ten-digit dialing is required within this region.
Area code 443 is a General Purpose Code which was placed in service on January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 443 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Maryland geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 81 |
| SPRINT SPECTRUM, L.P. | 60 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 59 |
| VERIZON MARYLAND, INC. | 44 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 34 |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 33 |
| CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | 28 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 26 |
| XO MARYLAND, LLC | 25 |
| US LEC OF MARYLAND, INC. | 23 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - MD | 18 |
| PAETEC COMMUNICATIONS, INC. - MD | 15 |
| COMCAST IP PHONE, LLC | 9 |
| CTC COMMUNICATIONS CORP. - MD | 9 |
| CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD | 5 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 5 |
| AT&T - LOCAL | 3 |
| LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 3 |
| ONVOY, LLC - MD | 3 |
| BANDWIDTH.COM CLEC, LLC - MD | 2 |
| CORE COMMUNICATIONS, INC.- MD | 2 |
| ATX TELECOMMUNICATIONS SERVICES, LTD. | 1 |
| BROADVIEW NETWORKS, INC. - MD | 1 |
| BROADWING COMMUNICATIONS, LLC - MD | 1 |
| CENTURYLINK COMMUNICATIONS, LLC | 1 |
| INTRADO COMMUNICATIONS, LLC | 1 |
| LOCAL ACCESS LLC - MD | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 1 |
| OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 1 |
| VDL, INC. DBA GLOBAL TELECOM BROKERS - MD | 1 |
| YMAX COMMUNICATIONS CORP. - MD | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| BALTIMORE | 139 |
| ANNAPOLIS | 32 |
| COLUMBIA | 27 |
| TOWSON | 25 |
| CATONSVL | 19 |
| GLENBURNIE | 19 |
| BEL AIR | 16 |
| SALISBURY | 16 |
| PIKESVILLE | 14 |
| ELKTON | 9 |
| ESSEX | 9 |
| ABERDEEN | 8 |
| EASTON | 8 |
| PARKVILLE | 8 |
| WESTMINSTR | 8 |
| EDGEWOOD | 7 |
| FALLSTON | 7 |
| PRINCEFRCK | 7 |
| COCKEYSVL | 6 |
| ELLICOTTCY | 6 |
| SYKESVILLE | 6 |
| WOODLAWN | 6 |
| ARBUTUS | 5 |
| CAMBRIDGE | 5 |
| ELKRIDGE | 5 |
| SEVERN | 5 |
| SEVERNA PK | 5 |
| WATERLO238 | 5 |
| RANDALLSTN | 4 |
| ARGRGBSNIS | 3 |
| BRYNPKLNCM | 3 |
| CHESTERTN | 3 |
| CROFTON | 3 |
| FORK | 3 |
| NORTHBEACH | 3 |
| REISTERSTN | 3 |
| BERLIN | 2 |
| CARDIFF | 2 |
| CENTREVL | 2 |
| CHASE | 2 |
| DELMAR | 2 |
| DUNDALK | 2 |
| HAMPSTEAD | 2 |
| HAVREGRACE | 2 |
| OCEAN CITY | 2 |
| PERRYVILLE | 2 |
| SOLOMONS | 2 |
| SPARROWSPT | 2 |
| WATERLO236 | 2 |
| WEST RIVER | 2 |
| CHESAPKECY | 1 |
| CHURCHVL | 1 |
| DARLINGTON | 1 |
| DENTON | 1 |
| NORTH EAST | 1 |
| ODENTON | 1 |
| SHARPTOWN | 1 |
| SILVER RUN | 1 |
| SPARKSGLNC | 1 |
| STEVENSVL | 1 |
| UNION BDG | 1 |
| WORTHINGTN | 1 |
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