MCLEAN — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - IL | 1015 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER NORTH, INC. - IL | 1015 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 1 |