Illinois, Missouri
Area codes
7
Rate centres
395
Carriers
95
Prefix blocks
19,942
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.
95 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 3,242 | 16.3% |
| T-MOBILE USA, INC. | 6529 | 2,362 | 11.8% |
| ONVOY, LLC - MO | 093F | 2,255 | 11.3% |
| SOUTHWESTERN BELL | 9533 | 2,011 | 10.1% |
| BANDWIDTH.COM CLEC, LLC - MO | 993E | 857 | 4.3% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | 661 | 3.3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | 607 | 3.0% |
| LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | 599 | 3.0% |
| ONVOY, LLC | 224C | 597 | 3.0% |
| CHARTER IP ENABLED SERVICES, LLC | 792K | 518 | 2.6% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 7218 | 445 | 2.2% |
| ILLINOIS BELL TEL CO | 9329 | 422 | 2.1% |
| ONVOY SPECTRUM, LLC | 624H | 399 | 2.0% |
| PAETEC ITEL, LLC | 829J | 399 | 2.0% |
| PEERLESS NETWORK OF MISSOURI, LLC - MO | 225F | 395 | 2.0% |
| TELNYX LLC | 073H | 340 | 1.7% |
| METROPCS, INC. | 5562 | 245 | 1.2% |
| IP HORIZON LLC | 515J | 244 | 1.2% |
| TERRA NOVA TELECOM INC. | 145J | 243 | 1.2% |
| BRIGHTSPEED OF MISSOURI, LLC | 9787 | 222 | 1.1% |
| CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | 204 | 1.0% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | 197 | 1.0% |
| AT&T CORP. | 516C | 190 | 1.0% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 181 | 0.9% |
| WINDSTREAM MISSOURI, INC. | 1885 | 168 | 0.8% |
395 rate centres. search them all.