Phone numbers in Sundance, Wyoming
Sundance has 5 phone prefixes in area code 307.
Biggest holders: Verizon Wireless, Range Tel Coop, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 60%
- Local phone company 40%
Every prefix in Sundance
Search the first six digits of a number in this list. If it's here, the number started in Sundance with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-281 | Verizon Wireless | Mobile carrier | – |
| 307-282 | Verizon Wireless | Mobile carrier | – |
| 307-283 | Range Tel Coop | Local phone company | – |
| 307-290 | AT&T Mobility | Mobile carrier | – |
| 307-790 | Union Telephone | Local phone company | 2003 |
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.