Phone numbers in Coal City, Illinois
Coal City has 6 phone prefixes in area codes 779, 815.
Biggest holders: Bandwidth, CenturyLink / Lumen, First Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 33%
- Internet / business phone carrier 50%
- Phone company 17%
Every prefix in Coal City
Search the first six digits of a number in this list. If it's here, the number started in Coal City with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 779-340 | Bandwidth | Internet / business phone carrier | 2021 |
| 815-205 | CenturyLink / Lumen | Local phone company | 2014 |
| 815-518 | First Communications | Phone company | 2001 |
| 815-634 | AT&T (local phone) | Local phone company | – |
| 815-655 | Teleport Communications America | Internet / business phone carrier | 2019 |
| 815-709 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.