Phone numbers in Storm Lake, Iowa
Storm Lake has 8 phone prefixes in area code 712.
Biggest holders: Verizon Wireless, CenturyLink / Lumen, Long Lines Metro. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 25%
- Internet / business phone carrier 12%
- Phone company 12%
Every prefix in Storm Lake
Search the first six digits of a number in this list. If it's here, the number started in Storm Lake with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 712-213 | Long Lines Metro | Phone company | – |
| 712-291 | Verizon Wireless | Mobile carrier | – |
| 712-299 | Verizon Wireless | Mobile carrier | – |
| 712-638 | AT&T Mobility | Mobile carrier | 2019 |
| 712-730 | UScellular | Mobile carrier | – |
| 712-732 | CenturyLink / Lumen | Local phone company | – |
| 712-749 | CenturyLink / Lumen | Local phone company | – |
| 712-936 | IP Horizon | Internet / business phone carrier | 2025 |
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.