Phone numbers in Cooperstown, North Dakota
Cooperstown has 3 phone prefixes in area code 701.
Biggest holders: AT&T Mobility, Verizon Wireless, Griggs County Tel. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Phone company 33%
Every prefix in Cooperstown
Search the first six digits of a number in this list. If it's here, the number started in Cooperstown with the carrier shown. If it isn't, check the North Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 701-309 | AT&T Mobility | Mobile carrier | 2002 |
| 701-789 | Verizon Wireless | Mobile carrier | – |
| 701-797 | Griggs County Tel | 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.