Phone numbers in Belgrade, Montana
Belgrade has 4 phone prefixes in area code 406.
Biggest holders: CenturyLink / Lumen, MCImetro (Verizon Business), Terra Nova Telecom. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 25%
- Internet / business phone carrier 75%
Every prefix in Belgrade
Search the first six digits of a number in this list. If it's here, the number started in Belgrade with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-388 | CenturyLink / Lumen | Local phone company | – |
| 406-813 | MCImetro (Verizon Business) | Internet / business phone carrier | 2011 |
| 406-919 | Terra Nova Telecom | Internet / business phone carrier | 2019 |
| 406-924 | Level 3 (Lumen) | Internet / business phone 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.