Phone numbers in Mt. View, Wyoming
Mt. View has 4 phone prefixes in area code 307.
Biggest holders: Union Telephone, AT&T Mobility, Union Tel. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 50%
- Phone company 25%
Every prefix in Mt. View
Search the first six digits of a number in this list. If it's here, the number started in Mt. View with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-402 | AT&T Mobility | Mobile carrier | 2021 |
| 307-747 | Union Telephone | Local phone company | 2003 |
| 307-780 | Union Telephone | Local phone company | – |
| 307-782 | Union Tel | 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.