Phone numbers in Yankton, South Dakota
Yankton has 14 phone prefixes in area code 605.
Biggest holders: AT&T Mobility, CenturyLink / Lumen, Bluepeak. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 21%
- Internet / business phone carrier 14%
- Phone company 21%
Every prefix in Yankton
Search the first six digits of a number in this list. If it's here, the number started in Yankton with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-260 | Bluepeak | Phone company | – |
| 605-500 | AT&T Mobility | Mobile carrier | 2006 |
| 605-522 | MetroPCS (T-Mobile) | Mobile carrier | 2021 |
| 605-653 | Bandwidth | Internet / business phone carrier | – |
| 605-655 | CenturyLink / Lumen | Local phone company | – |
| 605-660 | Verizon Wireless | Mobile carrier | – |
| 605-661 | AT&T Mobility | Mobile carrier | – |
| 605-664 | Bluepeak | Phone company | – |
| 605-665 | CenturyLink / Lumen | Local phone company | – |
| 605-668 | CenturyLink / Lumen | Local phone company | – |
| 605-689 | Midcontinent Communications | Phone company | 2007 |
| 605-760 | Verizon Wireless | Mobile carrier | – |
| 605-857 | AT&T Mobility | Mobile carrier | 2001 |
| 605-975 | Onvoy | Internet / business phone carrier | 2019 |
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.