Phone numbers in Chesterfield, Missouri
Chesterfield has 36 phone prefixes in area code 636.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 33%
- Internet / business phone carrier 42%
Every prefix in Chesterfield
Search the first six digits of a number in this list. If it's here, the number started in Chesterfield with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 636-214 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 636-216 | Onvoy | Internet / business phone carrier | – |
| 636-236 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 636-237 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 636-247 | AT&T (local phone) | Local phone company | 2002 |
| 636-252 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 636-262 | T-Mobile (including Sprint) | Mobile carrier | – |
| 636-268 | Onvoy | Internet / business phone carrier | 2024 |
| 636-292 | Teleport Communications America | Internet / business phone carrier | 2018 |
| 636-299 | T-Mobile (including Sprint) | Mobile carrier | – |
| 636-302 | Onvoy | Internet / business phone carrier | 2026 |
| 636-346 | T-Mobile (including Sprint) | Mobile carrier | – |
| 636-368 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 636-449 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 636-489 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 636-519 | AT&T (local phone) | Local phone company | – |
| 636-530 | AT&T (local phone) | Local phone company | – |
| 636-532 | AT&T (local phone) | Local phone company | – |
| 636-534 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 636-536 | AT&T (local phone) | Local phone company | – |
| 636-537 | AT&T (local phone) | Local phone company | – |
| 636-579 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 636-590 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 636-675 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 636-681 | Teleport Communications America | Internet / business phone carrier | – |
| 636-728 | AT&T (local phone) | Local phone company | – |
| 636-730 | AT&T (local phone) | Local phone company | – |
| 636-733 | AT&T (local phone) | Local phone company | – |
| 636-735 | AT&T (local phone) | Local phone company | – |
| 636-736 | AT&T (local phone) | Local phone company | – |
| 636-737 | AT&T (local phone) | Local phone company | – |
| 636-777 | Onvoy | Internet / business phone carrier | – |
| 636-778 | Charter / Spectrum | Internet / business phone carrier | – |
| 636-787 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 636-812 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 636-898 | MCImetro (Verizon Business) | 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.