Phone numbers in Wonder Lake, Illinois
Wonder Lake has 4 phone prefixes in area codes 779, 815.
Biggest holders: Frontier, Stratus Networks, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 50%
- Internet / business phone carrier 25%
- Phone company 25%
Every prefix in Wonder Lake
Search the first six digits of a number in this list. If it's here, the number started in Wonder Lake with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 779-291 | Stratus Networks | Phone company | 2020 |
| 779-444 | Bandwidth | Internet / business phone carrier | 2010 |
| 815-653 | Frontier | Local phone company | – |
| 815-728 | Frontier | Local phone company | – |
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.