Phone numbers in Imperial, Missouri
Imperial has 10 phone prefixes in area code 636.
Biggest holders: AT&T (local phone), Level 3 (Lumen), Charter / Spectrum. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 10%
- Local phone company 40%
- Internet / business phone carrier 50%
Every prefix in Imperial
Search the first six digits of a number in this list. If it's here, the number started in Imperial with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 636-223 | Charter / Spectrum | Internet / business phone carrier | 2002 |
| 636-461 | AT&T (local phone) | Local phone company | – |
| 636-464 | AT&T (local phone) | Local phone company | – |
| 636-467 | AT&T (local phone) | Local phone company | – |
| 636-500 | Onvoy | Internet / business phone carrier | – |
| 636-525 | AT&T (local phone) | Local phone company | 2001 |
| 636-547 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 636-633 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 636-642 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 636-741 | 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.