Phone numbers in Howard, South Dakota
Howard has 3 phone prefixes in area code 605.
Biggest holders: AT&T Mobility, Alliance Comm. Cooperative, Inc. (Split Rock), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Local phone company 33%
Every prefix in Howard
Search the first six digits of a number in this list. If it's here, the number started in Howard with the carrier shown. If it isn't, check the South Dakota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 605-579 | AT&T Mobility | Mobile carrier | 2005 |
| 605-772 | Alliance Comm. Cooperative, Inc. (Split Rock) | Local phone company | – |
| 605-851 | Verizon Wireless | Mobile carrier | 2014 |
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.