Phone numbers in Warsaw, Kentucky
Warsaw has 6 phone prefixes in area code 859.
Biggest holders: Onvoy, Cincinnati Bell, TON80 Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 17%
- Internet / business phone carrier 83%
Every prefix in Warsaw
Search the first six digits of a number in this list. If it's here, the number started in Warsaw with the carrier shown. If it isn't, check the Kentucky page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 859-203 | Onvoy | Internet / business phone carrier | 2016 |
| 859-567 | Cincinnati Bell | Local phone company | – |
| 859-832 | Onvoy | Internet / business phone carrier | 2001 |
| 859-837 | TON80 Communications | Internet / business phone carrier | 2022 |
| 859-904 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 859-935 | Windstream (PAETEC) | 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.