Phone numbers in Fairmont, Minnesota
Fairmont has 10 phone prefixes in area code 507.
Biggest holders: Verizon Wireless, T-Mobile (including Sprint), Frontier. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 70%
- Local phone company 20%
- Phone company 10%
Every prefix in Fairmont
Search the first six digits of a number in this list. If it's here, the number started in Fairmont with the carrier shown. If it isn't, check the Minnesota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 507-230 | AT&T Mobility | Mobile carrier | – |
| 507-235 | Frontier | Local phone company | – |
| 507-236 | Verizon Wireless | Mobile carrier | – |
| 507-238 | Frontier | Local phone company | – |
| 507-399 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 507-432 | T-Mobile (including Sprint) | Mobile carrier | 2010 |
| 507-618 | Verizon Wireless | Mobile carrier | 2018 |
| 507-749 | Midcontinent Communications | Phone company | 2008 |
| 507-806 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 507-848 | Verizon Wireless | Mobile carrier | 2004 |
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.