Phone numbers in Rock Valley, Iowa
Rock Valley has 5 phone prefixes in area code 712.
Biggest holders: Premier Communications, AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 60%
- Phone company 40%
Every prefix in Rock Valley
Search the first six digits of a number in this list. If it's here, the number started in Rock Valley with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-451 | Premier Communications | Phone company | 2006 |
| 712-460 | AT&T Mobility | Mobile carrier | – |
| 712-470 | AT&T Mobility | Mobile carrier | – |
| 712-476 | Premier Communications | Phone company | – |
| 712-607 | Verizon Wireless | Mobile carrier | 2024 |
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.