Phone numbers in Belfield, North Dakota
Belfield has 5 phone prefixes in area code 701.
Biggest holders: Onvoy, Consolidated Communications Networks, CenturyLink / Lumen. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 40%
- Internet / business phone carrier 60%
Every prefix in Belfield
Search the first six digits of a number in this list. If it's here, the number started in Belfield with the carrier shown. If it isn't, check the North Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 701-559 | Consolidated Communications Networks | Local phone company | – |
| 701-575 | CenturyLink / Lumen | Local phone company | – |
| 701-719 | Onvoy | Internet / business phone carrier | 2014 |
| 701-981 | Onvoy | Internet / business phone carrier | 2021 |
| 701-999 | Telnyx | Internet / business phone carrier | 2017 |
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.