Phone numbers in Knoxville, Iowa
Knoxville has 8 phone prefixes in area code 641.
Biggest holders: UScellular, Verizon Wireless, Windstream Iowa Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 62%
- Local phone company 25%
- Phone company 12%
Every prefix in Knoxville
Search the first six digits of a number in this list. If it's here, the number started in Knoxville with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 641-205 | Local Telephone Data Services | Phone company | – |
| 641-218 | UScellular | Mobile carrier | – |
| 641-318 | T-Mobile (including Sprint) | Mobile carrier | – |
| 641-820 | Verizon Wireless | Mobile carrier | – |
| 641-828 | Windstream Iowa Communications | Local phone company | – |
| 641-842 | Windstream Iowa Communications | Local phone company | – |
| 641-871 | Verizon Wireless | Mobile carrier | – |
| 641-891 | UScellular | Mobile carrier | – |
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.