Area code 712: where it is and who calls from it
Area code 712 is in Iowa.
Iowa (Sioux City, Council Bluffs, Denison, and most of western Iowa)
| Where | Iowa |
|---|---|
| Time zone | Central Time ยท local time |
| In service since | 1947 |
| Overlay | No |
| Prefixes assigned | 633 of 792 possible (80%) |
Where 712 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 712, with how many prefixes each has.
Plus 183 smaller rate centers.
Who holds 712 numbers
- Mobile carrier 26%
- Local phone company 31%
- Internet / business phone carrier 17%
- Phone company 26%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| Verizon Wireless | Mobile carrier | 68 | 11% |
| CenturyLink / Lumen | Local phone company | 66 | 10% |
| Windstream Iowa Communications, Inc. - North | Local phone company | 48 | 8% |
| AT&T Mobility | Mobile carrier | 43 | 7% |
| Onvoy | Internet / business phone carrier | 33 | 5% |
| Frontier | Local phone company | 26 | 4% |
| T-Mobile (including Sprint) | Mobile carrier | 22 | 3% |
| UScellular | Mobile carrier | 20 | 3% |
| Windstream Iowa Communications | Local phone company | 20 | 3% |
| Northwest Iowa Telephone | Phone company | 14 | 2% |
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.
States served: Iowa.
Other area codes in Iowa
Got a call from 712?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 712 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.