Phone numbers in Lewistown, Montana
Lewistown has 8 phone prefixes in area code 406.
Biggest holders: Verizon Wireless, AT&T Mobility, Mid-rivers Telephone Cooperative. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 25%
- Internet / business phone carrier 25%
- Phone company 12%
Every prefix in Lewistown
Search the first six digits of a number in this list. If it's here, the number started in Lewistown with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-350 | AT&T Mobility | Mobile carrier | – |
| 406-366 | Verizon Wireless | Mobile carrier | – |
| 406-380 | Verizon Wireless | Mobile carrier | – |
| 406-535 | Mid-rivers Telephone Cooperative | Local phone company | – |
| 406-538 | CenturyLink / Lumen | Local phone company | – |
| 406-707 | Terra Nova Telecom | Internet / business phone carrier | – |
| 406-708 | Wide Voice | Phone company | 2005 |
| 406-968 | Hd Carrier | Internet / business phone carrier | 2003 |
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.