Phone numbers in Rock Spring, Wyoming
Rock Spring has 17 phone prefixes in area code 307.
Biggest holders: Verizon Wireless, Union Telephone, CenturyLink / Lumen. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 35%
- Local phone company 35%
- Internet / business phone carrier 18%
- Phone company 12%
Every prefix in Rock Spring
Search the first six digits of a number in this list. If it's here, the number started in Rock Spring with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-209 | Verizon Wireless | Mobile carrier | 2014 |
| 307-212 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 307-252 | Uintah Basin Electronic Telecommunications | Phone company | – |
| 307-350 | Union Telephone | Local phone company | – |
| 307-352 | CenturyLink / Lumen | Local phone company | – |
| 307-354 | Union Telephone | Local phone company | 2001 |
| 307-362 | CenturyLink / Lumen | Local phone company | – |
| 307-371 | Verizon Wireless | Mobile carrier | – |
| 307-374 | Vonage America | Internet / business phone carrier | – |
| 307-382 | CenturyLink / Lumen | Local phone company | – |
| 307-389 | Verizon Wireless | Mobile carrier | – |
| 307-448 | Verizon Wireless | Mobile carrier | 2011 |
| 307-449 | AT&T Mobility | Mobile carrier | – |
| 307-451 | Vonage America | Internet / business phone carrier | 2024 |
| 307-522 | Airus | Phone company | 2017 |
| 307-705 | Union Telephone | Local phone company | 2003 |
| 307-922 | 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.