Maryland, Pennsylvania, West Virginia
Area codes
9
Rate centres
47
Carriers
62
Prefix blocks
3,998
A Local Access and Transport Area is the region a call is routed within before it becomes long-haul. The boundaries were drawn when the Bell System was broken up in 1984: a local carrier could carry a call inside its LATA, and a long-distance carrier had to take it across one. The division still shapes how calls are routed and rated today, which is why every prefix block on this site carries a LATA.
62 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 502 | 12.6% |
| VERIZON MARYLAND, INC. | 9212 | 462 | 11.6% |
| ONVOY, LLC - MD | 876D | 395 | 9.9% |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | 318 | 8.0% |
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 260 | 6.5% |
| METROPCS, INC. | 5562 | 192 | 4.8% |
| CORE COMMUNICATIONS, INC.- MD | 2593 | 191 | 4.8% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | 186 | 4.7% |
| ONVOY SPECTRUM, LLC | 624H | 139 | 3.5% |
| COMCAST IP PHONE, LLC | 318J | 130 | 3.3% |
| ONVOY, LLC - WV | 449F | 110 | 2.8% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 104 | 2.6% |
| USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD | 4720 | 89 | 2.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | 68 | 1.7% |
| UNITED STATES CELLULAR - WV | 6284 | 67 | 1.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | 62 | 1.6% |
| COMMIO, LLC | 939H | 59 | 1.5% |
| TELNYX LLC | 073H | 59 | 1.5% |
| FRONTIER WEST VIRGINIA INC. | 9214 | 55 | 1.4% |
| CORETEL WEST VIRGINIA, INC. - WV | 5833 | 42 | 1.1% |
| CENTURYLINK COMMUNICATIONS, LLC | 508J | 39 | 1.0% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV | 6394 | 34 | 0.9% |
| PEERLESS NETWORK OF MARYLAND, LLC | 568G | 34 | 0.9% |
| BANDWIDTH.COM CLEC, LLC - WV | 080F | 31 | 0.8% |
| LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | 30 | 0.8% |
47 rate centres. search them all.