Phone numbers in Rockwellcy, Iowa
Rockwellcy has 5 phone prefixes in area code 712.
Biggest holders: Windstream Iowa Communications, Inc. - North, Onvoy, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 40%
- Internet / business phone carrier 40%
Every prefix in Rockwellcy
Search the first six digits of a number in this list. If it's here, the number started in Rockwellcy with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-290 | Windstream Iowa Communications, Inc. - North | Local phone company | 2015 |
| 712-297 | Windstream Iowa Communications, Inc. - North | Local phone company | – |
| 712-672 | Onvoy | Internet / business phone carrier | 2021 |
| 712-887 | Verizon Wireless | Mobile carrier | – |
| 712-901 | Onvoy | Internet / business phone carrier | 2021 |
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.