Phone numbers in Cedar Hill, Missouri
Cedar Hill has 8 phone prefixes in area code 636.
Biggest holders: Verizon Wireless, AT&T (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 25%
- Internet / business phone carrier 50%
Every prefix in Cedar Hill
Search the first six digits of a number in this list. If it's here, the number started in Cedar Hill with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 636-222 | Verizon Wireless | Mobile carrier | 2002 |
| 636-274 | AT&T (local phone) | Local phone company | – |
| 636-285 | AT&T (local phone) | Local phone company | – |
| 636-406 | Onvoy | Internet / business phone carrier | 2024 |
| 636-551 | Verizon Wireless | Mobile carrier | 2014 |
| 636-635 | Onvoy | Internet / business phone carrier | 2021 |
| 636-707 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 636-748 | Bandwidth | 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.