District of Columbia, Maryland, Virginia
Area codes
12
Rate centres
50
Carriers
93
Prefix blocks
27,439
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.
93 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | 4,072 | 14.8% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 2,729 | 9.9% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 1,578 | 5.8% |
| VERIZON MARYLAND, INC. | 9212 | 1,514 | 5.5% |
| VERIZON VIRGINIA, INC. | 9213 | 1,360 | 5.0% |
| ONVOY, LLC - MD | 876D | 1,142 | 4.2% |
| PAETEC ITEL, LLC | 829J | 1,141 | 4.2% |
| METROPCS, INC. | 5562 | 1,133 | 4.1% |
| ONVOY, LLC - VA | 138E | 989 | 3.6% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | 926 | 3.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | 817 | 3.0% |
| VERIZON WASHINGTON DC, INC. | 9211 | 808 | 2.9% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC | 6402 | 789 | 2.9% |
| COMCAST IP PHONE, LLC | 318J | 773 | 2.8% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - DC | 7529 | 727 | 2.6% |
| ONVOY, LLC - DC | 850D | 704 | 2.6% |
| BANDWIDTH.COM CLEC, LLC - VA | 079F | 632 | 2.3% |
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 610 | 2.2% |
| LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | 580 | 2.1% |
| BANDWIDTH.COM CLEC, LLC - DC | 074F | 570 | 2.1% |
| ONVOY SPECTRUM, LLC | 624H | 497 | 1.8% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 413 | 1.5% |
| CORE COMMUNICATIONS, INC.- MD | 2593 | 352 | 1.3% |
| LEVEL 3 COMMUNICATIONS, LLC - DC | 6117 | 271 | 1.0% |
| VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | 251 | 0.9% |
50 rate centres. search them all.