Phone numbers in Rock Rapids, Iowa
Rock Rapids has 3 phone prefixes in area code 712.
Biggest holders: T-Mobile (including Sprint), AT&T Mobility, Premier Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Phone company 33%
Every prefix in Rock Rapids
Search the first six digits of a number in this list. If it's here, the number started in Rock Rapids with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-381 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 712-400 | AT&T Mobility | Mobile carrier | 2006 |
| 712-472 | Premier Communications | Phone company | – |
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.