Phone numbers in Ottumwa, Iowa
Ottumwa has 15 phone prefixes in area code 641.
Biggest holders: AT&T Mobility, Verizon Wireless, CenturyLink / Lumen. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Local phone company 20%
- Internet / business phone carrier 7%
- Phone company 7%
Every prefix in Ottumwa
Search the first six digits of a number in this list. If it's here, the number started in Ottumwa with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 641-226 | AT&T Mobility | Mobile carrier | 2001 |
| 641-244 | AT&T Mobility | Mobile carrier | 2016 |
| 641-277 | AT&T Mobility | Mobile carrier | 2020 |
| 641-455 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 641-575 | Bandwidth | Internet / business phone carrier | 2018 |
| 641-680 | Verizon Wireless | Mobile carrier | – |
| 641-682 | CenturyLink / Lumen | Local phone company | – |
| 641-683 | CenturyLink / Lumen | Local phone company | – |
| 641-684 | CenturyLink / Lumen | Local phone company | – |
| 641-777 | UScellular | Mobile carrier | – |
| 641-799 | UScellular | Mobile carrier | – |
| 641-814 | Local Telephone Data Services | Phone company | – |
| 641-954 | Verizon Wireless | Mobile carrier | – |
| 641-980 | Verizon Wireless | Mobile carrier | – |
| 641-997 | UScellular | Mobile carrier | 2024 |
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.