Illinois
Area codes
2
Rate centres
60
Carriers
30
Prefix blocks
863
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.
30 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 229 | 26.5% |
| FRONTIER NORTH, INC. - IL | 1015 | 149 | 17.3% |
| ONVOY, LLC | 224C | 127 | 14.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | 84 | 9.7% |
| DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL | 9915 | 44 | 5.1% |
| ONVOY SPECTRUM, LLC | 624H | 42 | 4.9% |
| FRONTIER NORTH, INC. - IL | 1036 | 41 | 4.8% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 33 | 3.8% |
| NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | 28 | 3.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 13 | 1.5% |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 12 | 1.4% |
| T-MOBILE USA, INC. | 6529 | 9 | 1.0% |
| WABASH TEL. COOP., INC. | 1088 | 9 | 1.0% |
| HAMILTON COUNTY TELEPHONE CO-OP | 1024 | 7 | 0.8% |
| NUSO, LLC | 478J | 5 | 0.6% |
| METROPCS, INC. | 5562 | 4 | 0.5% |
| TELNYX LLC | 073H | 3 | 0.3% |
| VONAGE AMERICA LLC | 197D | 3 | 0.3% |
| BANDWIDTH.COM CLEC, LLC - IL | 984E | 2 | 0.2% |
| COMCAST IP PHONE, LLC | 318J | 2 | 0.2% |
| EXIANT COMMUNICATIONS LLC | 114J | 2 | 0.2% |
| IP HORIZON LLC | 515J | 2 | 0.2% |
| NUSO, LLC | 551G | 2 | 0.2% |
| NUSO, LLC | 732J | 2 | 0.2% |
| SKYE TELECOM LLC DBA SKYETEL | 622J | 2 | 0.2% |
60 rate centres. search them all.