Phone numbers in Warsaw, Missouri
Warsaw has 6 phone prefixes in area code 660.
Biggest holders: CenturyLink / Lumen, Level 3 (Lumen), T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 33%
- Internet / business phone carrier 33%
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 Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 660-223 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 660-428 | CenturyLink / Lumen | Local phone company | – |
| 660-438 | CenturyLink / Lumen | Local phone company | – |
| 660-556 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 660-723 | AT&T Mobility | Mobile carrier | – |
| 660-900 | Fractel | Internet / business phone carrier | 2019 |
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.