Phone numbers in Glasgow, Montana
Glasgow has 4 phone prefixes in area code 406.
Biggest holders: Verizon Wireless, Nemont Tel Coop, Sagebrush Cellular. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 75%
- Local phone company 25%
Every prefix in Glasgow
Search the first six digits of a number in this list. If it's here, the number started in Glasgow with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-228 | Nemont Tel Coop | Local phone company | – |
| 406-230 | Verizon Wireless | Mobile carrier | – |
| 406-263 | Sagebrush Cellular | Mobile carrier | – |
| 406-942 | Verizon Wireless | Mobile carrier | 2009 |
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.