Phone numbers in Riverton, Wyoming
Riverton has 13 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 23%
- Local phone company 46%
- Internet / business phone carrier 23%
- Phone company 8%
Every prefix in Riverton
Search the first six digits of a number in this list. If it's here, the number started in Riverton with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-240 | Verizon Wireless | Mobile carrier | – |
| 307-454 | Onvoy | Internet / business phone carrier | 2024 |
| 307-463 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 307-556 | Onvoy | Internet / business phone carrier | 2021 |
| 307-709 | Union Telephone | Local phone company | 2003 |
| 307-840 | Verizon Wireless | Mobile carrier | – |
| 307-850 | Union Telephone | Local phone company | – |
| 307-851 | Verizon Wireless | Mobile carrier | – |
| 307-854 | Advanced Communications Technology | Phone company | 2007 |
| 307-855 | CenturyLink / Lumen | Local phone company | – |
| 307-856 | CenturyLink / Lumen | Local phone company | – |
| 307-857 | CenturyLink / Lumen | Local phone company | – |
| 307-858 | Union Telephone | 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.