Phone numbers in Gillette, Wyoming
Gillette has 21 phone prefixes in area code 307.
Biggest holders: AT&T Mobility, CenturyLink / Lumen, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 33%
- Internet / business phone carrier 24%
- Phone company 5%
Every prefix in Gillette
Search the first six digits of a number in this list. If it's here, the number started in Gillette with the carrier shown. If it isn't, check the Wyoming page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 307-228 | Bandwidth | Internet / business phone carrier | 2014 |
| 307-257 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 307-299 | AT&T Mobility | Mobile carrier | 2003 |
| 307-363 | Bandwidth | Internet / business phone carrier | 2010 |
| 307-387 | Bandwidth | Internet / business phone carrier | 2021 |
| 307-434 | Onvoy | Internet / business phone carrier | 2024 |
| 307-487 | Verizon Wireless | Mobile carrier | 2018 |
| 307-567 | Union Telephone | Local phone company | – |
| 307-622 | AT&T Mobility | Mobile carrier | 2010 |
| 307-660 | AT&T Mobility | Mobile carrier | – |
| 307-670 | Verizon Wireless | Mobile carrier | – |
| 307-680 | AT&T Mobility | Mobile carrier | – |
| 307-681 | Advanced Communications Technology | Phone company | 2010 |
| 307-682 | CenturyLink / Lumen | Local phone company | – |
| 307-685 | CenturyLink / Lumen | Local phone company | – |
| 307-686 | CenturyLink / Lumen | Local phone company | – |
| 307-687 | CenturyLink / Lumen | Local phone company | – |
| 307-688 | CenturyLink / Lumen | Local phone company | 2004 |
| 307-689 | Verizon Wireless | Mobile carrier | – |
| 307-696 | AT&T Mobility | Mobile carrier | 2008 |
| 307-704 | Union Telephone | Local phone company | 2002 |
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.