Phone numbers in Denison, Iowa
Denison has 7 phone prefixes in area code 712.
Biggest holders: Verizon Wireless, Frontier, Btc. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 57%
- Local phone company 29%
- Phone company 14%
Every prefix in Denison
Search the first six digits of a number in this list. If it's here, the number started in Denison with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-263 | Frontier | Local phone company | – |
| 712-265 | Frontier | Local phone company | – |
| 712-267 | Verizon Wireless | Mobile carrier | – |
| 712-269 | Verizon Wireless | Mobile carrier | – |
| 712-393 | Btc | Phone company | – |
| 712-419 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 712-854 | Verizon Wireless | Mobile carrier | 2005 |
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.