Phone numbers in Lake Andes, South Dakota
Lake Andes has 4 phone prefixes in area code 605.
Biggest holders: Verizon Wireless, Mt Rushmore Telephone, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 75%
- Local phone company 25%
Every prefix in Lake Andes
Search the first six digits of a number in this list. If it's here, the number started in Lake Andes with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-469 | Verizon Wireless | Mobile carrier | – |
| 605-481 | Verizon Wireless | Mobile carrier | – |
| 605-487 | Mt Rushmore Telephone | Local phone company | – |
| 605-491 | AT&T Mobility | Mobile carrier | – |
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.