Phone numbers in Green River, Wyoming
Green River has 10 phone prefixes in area code 307.
Biggest holders: Bandwidth, Verizon Wireless, Union Telephone. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 40%
- Internet / business phone carrier 30%
- Phone company 10%
Every prefix in Green River
Search the first six digits of a number in this list. If it's here, the number started in Green River with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-297 | Uintah Basin Electronic Telecommunications | Phone company | – |
| 307-303 | Bandwidth | Internet / business phone carrier | 2020 |
| 307-364 | Bandwidth | Internet / business phone carrier | 2014 |
| 307-396 | Bandwidth | Internet / business phone carrier | 2021 |
| 307-466 | Verizon Wireless | Mobile carrier | – |
| 307-707 | Union Telephone | Local phone company | 2003 |
| 307-870 | Union Telephone | Local phone company | – |
| 307-871 | Verizon Wireless | Mobile carrier | – |
| 307-872 | CenturyLink / Lumen | Local phone company | – |
| 307-875 | CenturyLink / Lumen | 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.