Phone numbers in Gardner, Illinois
Gardner has 6 phone prefixes in area code 815.
Biggest holders: Level 3 (Lumen), AT&T (local phone), First Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 17%
- Internet / business phone carrier 50%
- Phone company 33%
Every prefix in Gardner
Search the first six digits of a number in this list. If it's here, the number started in Gardner with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 815-237 | AT&T (local phone) | Local phone company | – |
| 815-305 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-346 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 815-504 | First Communications | Phone company | – |
| 815-649 | Rcn Telecom Services Of Illinios | Phone company | – |
| 815-940 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
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.