Illinois
Area codes
2
Rate centres
69
Carriers
43
Prefix blocks
1,975
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.
43 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 565 | 28.6% |
| FRONTIER NORTH, INC. - IL | 1015 | 315 | 15.9% |
| ONVOY, LLC | 224C | 270 | 13.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | 185 | 9.4% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 92 | 4.7% |
| DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL | 9915 | 59 | 3.0% |
| ONVOY SPECTRUM, LLC | 624H | 57 | 2.9% |
| TELNYX LLC | 073H | 53 | 2.7% |
| T-MOBILE USA, INC. | 6529 | 50 | 2.5% |
| STRATUS NETWORKS | 495J | 44 | 2.2% |
| TERRA NOVA TELECOM INC. | 145J | 44 | 2.2% |
| COMMIO, LLC | 939H | 36 | 1.8% |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 35 | 1.8% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 27 | 1.4% |
| ILLINOIS BELL TEL CO | 9329 | 21 | 1.1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 12 | 0.6% |
| METROPCS, INC. | 5562 | 10 | 0.5% |
| SHAWNEE TEL. CO. | 1025 | 9 | 0.5% |
| SHAWNEELEC, INC. | 458H | 9 | 0.5% |
| FRONTIER NORTH, INC. - IL | 1036 | 8 | 0.4% |
| AT&T CORP. | 516C | 7 | 0.4% |
| BOOST SUBSCRIBERCO L.L.C. | 490J | 7 | 0.4% |
| NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | 7 | 0.4% |
| NUSO, LLC | 732J | 6 | 0.3% |
| HD CARRIER LLC | 321J | 5 | 0.3% |
69 rate centres. search them all.