Phone numbers in Martin, South Dakota
Martin has 8 phone prefixes in area code 605.
Biggest holders: AT&T Mobility, Golden West Telecomm. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 88%
- Local phone company 12%
Every prefix in Martin
Search the first six digits of a number in this list. If it's here, the number started in Martin with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-407 | AT&T Mobility | Mobile carrier | 2009 |
| 605-441 | AT&T Mobility | Mobile carrier | 2001 |
| 605-454 | AT&T Mobility | Mobile carrier | 2004 |
| 605-685 | Golden West Telecomm | Local phone company | – |
| 605-899 | AT&T Mobility | Mobile carrier | 2010 |
| 605-944 | AT&T Mobility | Mobile carrier | 2009 |
| 605-970 | AT&T Mobility | Mobile carrier | 2017 |
| 605-980 | AT&T Mobility | Mobile carrier | 2017 |
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.