Phone numbers in Louisville, Illinois
Louisville has 3 phone prefixes in area code 618.
Biggest holders: Mediacom Telephony Of Illinois, Wabash Tel. Coop. This is the local calling area (rate center) where those prefixes were first assigned.
- Internet / business phone carrier 67%
- Phone company 33%
Every prefix in Louisville
Search the first six digits of a number in this list. If it's here, the number started in Louisville with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 618-460 | Mediacom Telephony Of Illinois | Internet / business phone carrier | 2010 |
| 618-665 | Wabash Tel. Coop | Phone company | – |
| 618-821 | Mediacom Telephony Of Illinois | Internet / business phone carrier | – |
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.