Phone numbers in Southhavre, Montana
Southhavre has 3 phone prefixes in area code 406.
Biggest holders: Verizon Wireless, Triangle Tel. Coop. Assn. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Phone company 33%
Every prefix in Southhavre
Search the first six digits of a number in this list. If it's here, the number started in Southhavre with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-390 | Verizon Wireless | Mobile carrier | – |
| 406-395 | Triangle Tel. Coop. Assn | Phone company | – |
| 406-399 | Verizon Wireless | Mobile 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.