Phone numbers in Newcastle, Wyoming
Newcastle has 6 phone prefixes in area code 307.
Biggest holders: Rt Communications, Verizon Wireless, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 17%
- Phone company 33%
Every prefix in Newcastle
Search the first six digits of a number in this list. If it's here, the number started in Newcastle with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-465 | Rt Communications | Phone company | – |
| 307-629 | AT&T Mobility | Mobile carrier | 2004 |
| 307-744 | Union Telephone | Local phone company | 2002 |
| 307-746 | Rt Communications | Phone company | – |
| 307-941 | Verizon Wireless | Mobile carrier | – |
| 307-949 | Verizon Wireless | Mobile carrier | – |
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.