Phone numbers in Warrenton, Missouri
Warrenton has 10 phone prefixes in area code 636.
Biggest holders: AT&T Mobility, Onvoy, Brightspeed Of Missouri. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 20%
- Internet / business phone carrier 40%
Every prefix in Warrenton
Search the first six digits of a number in this list. If it's here, the number started in Warrenton with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 636-201 | AT&T Mobility | Mobile carrier | 2020 |
| 636-202 | MCImetro (Verizon Business) | Internet / business phone carrier | 2018 |
| 636-204 | Onvoy | Internet / business phone carrier | 2021 |
| 636-213 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 636-235 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 636-297 | Verizon Wireless | Mobile carrier | – |
| 636-359 | AT&T Mobility | Mobile carrier | – |
| 636-377 | Brightspeed Of Missouri | Local phone company | 2006 |
| 636-456 | Brightspeed Of Missouri | Local phone company | – |
| 636-589 | Onvoy | Internet / business phone carrier | 2022 |
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.