Phone numbers in Ftthompson, South Dakota
Ftthompson has 4 phone prefixes in area code 605.
Biggest holders: Native American Telecom, Midstate Communications, TON80 Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Internet / business phone carrier 25%
- Phone company 75%
Every prefix in Ftthompson
Search the first six digits of a number in this list. If it's here, the number started in Ftthompson with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-245 | Midstate Communications | Phone company | – |
| 605-417 | Native American Telecom | Phone company | 2017 |
| 605-477 | Native American Telecom | Phone company | 2009 |
| 605-752 | TON80 Communications | Internet / business phone carrier | 2022 |
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.