The 301 area code is a telephone area code serving the western part of Maryland, including Maryland's portion of the Greater Washington, D. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 301 area code) below and access available caller information such as name, address, and more.
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Area code 301 covers the western part of Maryland, encompassing areas within the Greater Washington, D.C. metropolitan region, sections of southern Maryland, and rural western Maryland.
Area code 301 is part of an overlay system with area codes 240 and 227. This means that multiple area codes serve the same geographic region. Area code 301 was established in 1947, area code 240 was added in 1997, and area code 227 was added on June 14, 2023. Ten-digit dialing is required for all calls within this region.
Area code 301 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 301 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 |
|---|---|
| VERIZON MARYLAND, INC. | 419 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 49 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 42 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 37 |
| SPRINT SPECTRUM, L.P. | 26 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - DC | 26 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 15 |
| COMCAST IP PHONE, LLC | 10 |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6 |
| PAETEC COMMUNICATIONS, INC. - MD | 6 |
| BANDWIDTH.COM CLEC, LLC - MD | 5 |
| STARPOWER COMMUNICATIONS, LLC - MD | 5 |
| USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD | 5 |
| SPRINT SPECTRUM, LP - MD | 4 |
| CORE COMMUNICATIONS, INC.- MD | 3 |
| LEVEL 3 TELECOM OF MARYLAND, LLC - MD | 3 |
| CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD | 2 |
| ONVOY, LLC - MD | 2 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 2 |
| BALTIMORE-WASHINGTON TELEPHONE (BWT) | 1 |
| IDT AMERICA, CORP. - MD | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 1 |
| MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD | 1 |
| ONVOY SPECTRUM, LLC | 1 |
| QUANTUM TELECOMMUNICATIONS, INC. - MD | 1 |
| US LEC OF MARYLAND, INC. | 1 |
| USA MOBILITY WIRELESS, INC. | 1 |
| VDL, INC. DBA GLOBAL TELECOM BROKERS - MD | 1 |
| XO MARYLAND, LLC | 1 |
| YMAX COMMUNICATIONS CORP. - MD | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| WSHNGTNZN3 | 103 |
| WSHNGTNZN2 | 78 |
| WSNGTNZN10 | 47 |
| WSNG236Z13 | 38 |
| WSHNGTNZN4 | 37 |
| FREDERICK | 35 |
| GAITHERSBG | 32 |
| WSHNGTNZN5 | 29 |
| WSNGTNZN11 | 27 |
| LAUREL236 | 22 |
| WALDORF | 22 |
| WSNG236Z14 | 20 |
| HAGERSTOWN | 19 |
| WSHNGTNZN6 | 18 |
| CUMBERLAND | 13 |
| WSNGTNZN12 | 13 |
| LXTNPKGRML | 9 |
| ASHTON236 | 8 |
| LEONARDTN | 8 |
| OAKLAND | 7 |
| WSNG236Z15 | 7 |
| DAMASCS236 | 6 |
| WSNG238Z14 | 6 |
| INDIANHEAD | 5 |
| MYERSVILLE | 5 |
| WSNGTNZN16 | 5 |
| BRANDYWINE | 4 |
| DAMASCS240 | 4 |
| KEEDYSVL | 3 |
| LA PLATA | 3 |
| LAUREL238 | 3 |
| MECHANCSVL | 3 |
| ASHTON238 | 2 |
| BRUNSWICK | 2 |
| BUCKEYSTN | 2 |
| FRIENDSVL | 2 |
| FROSTBURG | 2 |
| MOUNT AIRY | 2 |
| NEW MARKET | 2 |
| WALKERSVL | 2 |
| WSNG238Z15 | 2 |
| BITTINGER | 1 |
| CLEAR SPG | 1 |
| EMMITSBURG | 1 |
| FLINTSTONE | 1 |
| GRANTSVL | 1 |
| HANCOCK | 1 |
| HIGHFIELD | 1 |
| HUGHESVL | 1 |
| KITZMILLER | 1 |
| LONACONING | 1 |
| MIDDLETOWN | 1 |
| MT SAVAGE | 1 |
| NANJEMOY | 1 |
| POOLESVL | 1 |
| RIDGE | 1 |
| SMITHSBURG | 1 |
| THURMONT | 1 |
| TOMPKINSVL | 1 |
| WESTERNPT | 1 |
| WILLIAMSPT | 1 |
| WSNG238Z13 | 1 |
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