Phone numbers in Bigstonecy, South Dakota
Bigstonecy has 4 phone prefixes in area code 605.
Biggest holders: Midcontinent Communications, Onvoy, CenturyLink / Lumen. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 25%
- Internet / business phone carrier 50%
- Phone company 25%
Every prefix in Bigstonecy
Search the first six digits of a number in this list. If it's here, the number started in Bigstonecy with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-541 | Midcontinent Communications | Phone company | 2008 |
| 605-674 | Onvoy | Internet / business phone carrier | 2020 |
| 605-862 | CenturyLink / Lumen | Local phone company | – |
| 605-992 | 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.