Phone numbers in Hamilton, Montana
Hamilton has 8 phone prefixes in area code 406.
Biggest holders: Verizon Wireless, CenturyLink / Lumen, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 62%
- Local phone company 38%
Every prefix in Hamilton
Search the first six digits of a number in this list. If it's here, the number started in Hamilton with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-360 | Verizon Wireless | Mobile carrier | – |
| 406-361 | Verizon Wireless | Mobile carrier | 2011 |
| 406-363 | CenturyLink / Lumen | Local phone company | – |
| 406-369 | AT&T Mobility | Mobile carrier | – |
| 406-375 | CenturyLink / Lumen | Local phone company | – |
| 406-381 | Verizon Wireless | Mobile carrier | – |
| 406-802 | Verizon Wireless | Mobile carrier | – |
| 406-961 | CenturyLink / Lumen | Local phone company | – |
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.