Phone numbers in Winterset, Iowa
Winterset has 17 phone prefixes in area code 515.
Biggest holders: UScellular, Commio, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 65%
- Local phone company 12%
- Internet / business phone carrier 24%
Every prefix in Winterset
Search the first six digits of a number in this list. If it's here, the number started in Winterset with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 515-340 | Commio | Internet / business phone carrier | 2023 |
| 515-384 | Bandwidth | Internet / business phone carrier | 2021 |
| 515-462 | CenturyLink / Lumen | Local phone company | – |
| 515-468 | Verizon Wireless | Mobile carrier | – |
| 515-474 | AT&T Mobility | Mobile carrier | 2018 |
| 515-493 | Mcc Telephony Of Iowa | Internet / business phone carrier | 2010 |
| 515-705 | Level 3 (Lumen) | Internet / business phone carrier | 2010 |
| 515-728 | UScellular | Mobile carrier | 2025 |
| 515-739 | Omnitel Communications | Local phone company | 2015 |
| 515-801 | UScellular | Mobile carrier | 2025 |
| 515-804 | UScellular | Mobile carrier | 2025 |
| 515-806 | UScellular | Mobile carrier | 2025 |
| 515-810 | UScellular | Mobile carrier | 2025 |
| 515-818 | UScellular | Mobile carrier | 2025 |
| 515-819 | UScellular | Mobile carrier | 2025 |
| 515-841 | UScellular | Mobile carrier | 2025 |
| 515-905 | UScellular | Mobile 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.