MARSHALL — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 5 |
| TELNYX LLC | 073H | 1 |
| FRONTIER NORTH, INC. - IL | 1015 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 1 |