Phone numbers in Miles City, Montana
Miles City has 10 phone prefixes in area code 406.
Biggest holders: CenturyLink / Lumen, Mid-rivers Telephone Cooperative, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 40%
- Internet / business phone carrier 10%
- Phone company 10%
Every prefix in Miles City
Search the first six digits of a number in this list. If it's here, the number started in Miles City with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-232 | CenturyLink / Lumen | Local phone company | – |
| 406-233 | CenturyLink / Lumen | Local phone company | – |
| 406-234 | Mid-rivers Telephone Cooperative | Local phone company | – |
| 406-851 | AT&T Mobility | Mobile carrier | – |
| 406-852 | Verizon Wireless | Mobile carrier | – |
| 406-853 | Verizon Wireless | Mobile carrier | – |
| 406-874 | Mid-rivers Telephone Cooperative | Local phone company | – |
| 406-934 | Wide Voice | Phone company | – |
| 406-944 | Level 3 (Lumen) | Internet / business phone carrier | 2003 |
| 406-951 | AT&T Mobility | 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.