Phone numbers in Onawa, Iowa
Onawa has 6 phone prefixes in area code 712.
Biggest holders: Verizon Wireless, AT&T Mobility, Stratus Networks. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 17%
- Phone company 33%
Every prefix in Onawa
Search the first six digits of a number in this list. If it's here, the number started in Onawa with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-219 | AT&T Mobility | Mobile carrier | 2003 |
| 712-398 | Stratus Networks | Phone company | 2020 |
| 712-420 | Verizon Wireless | Mobile carrier | – |
| 712-423 | CenturyLink / Lumen | Local phone company | – |
| 712-431 | Verizon Wireless | Mobile carrier | – |
| 712-433 | Commchoice Of Iowa | 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.