Illinois, Wisconsin
Area codes
4
Rate centres
157
Carriers
86
Prefix blocks
5,794
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.
86 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| ONVOY, LLC - WI | 225C | 795 | 13.7% |
| UNITED STATES CELLULAR - WI | 6274 | 745 | 12.9% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | 520 | 9.0% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 368 | 6.4% |
| T-MOBILE USA, INC. | 6529 | 327 | 5.6% |
| WISCONSIN BELL INC | 9327 | 282 | 4.9% |
| FRONTIER NORTH INC. - WI | 0886 | 248 | 4.3% |
| LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | 243 | 4.2% |
| CHARTER IP ENABLED SERVICES, LLC | 792K | 226 | 3.9% |
| BANDWIDTH.COM CLEC, LLC - WI | 007F | 224 | 3.9% |
| TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | 160 | 2.8% |
| TERRA NOVA TELECOM INC. | 145J | 137 | 2.4% |
| ONVOY SPECTRUM, LLC | 624H | 122 | 2.1% |
| TDS METROCOM, LLC | 520K | 122 | 2.1% |
| CENTURYLINK COMMUNICATIONS, LLC | 508J | 109 | 1.9% |
| BRIGHTSPEED OF CENTRAL WISCONSIN, LLC | 1159 | 97 | 1.7% |
| METROPCS, INC. | 5562 | 87 | 1.5% |
| PAETEC ITEL, LLC | 829J | 86 | 1.5% |
| TON80 COMMUNICATIONS, LLC | 516J | 66 | 1.1% |
| MCC TELEPHONY OF THE MIDWEST, LLC - WI | 983F | 55 | 0.9% |
| BRIGHTSPEED OF WESTERN WISCONSIN, LLC | 0922 | 53 | 0.9% |
| BRIGHTSPEED OF MIDWEST WISCONSIN, LLC | 0913 | 52 | 0.9% |
| UTELCO, INC. | 0963 | 50 | 0.9% |
| PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | 49 | 0.8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 45 | 0.8% |
157 rate centres. search them all.