Phone numbers in Belle Fourche, South Dakota
Belle Fourche has 7 phone prefixes in area code 605.
Biggest holders: Verizon Wireless, AT&T Mobility, Midcontinent Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 14%
- Internet / business phone carrier 14%
- Phone company 29%
Every prefix in Belle Fourche
Search the first six digits of a number in this list. If it's here, the number started in Belle Fourche with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-210 | AT&T Mobility | Mobile carrier | – |
| 605-568 | Midcontinent Communications | Phone company | 2006 |
| 605-569 | Verizon Wireless | Mobile carrier | 2008 |
| 605-699 | Bandwidth | Internet / business phone carrier | 2011 |
| 605-723 | Bluepeak | Phone company | – |
| 605-801 | Verizon Wireless | Mobile carrier | 2021 |
| 605-892 | 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.