Phone numbers in Jefferson, Iowa
Jefferson has 4 phone prefixes in area code 515.
Biggest holders: UScellular, Jefferson Tel, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 75%
- Phone company 25%
Every prefix in Jefferson
Search the first six digits of a number in this list. If it's here, the number started in Jefferson with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 515-370 | UScellular | Mobile carrier | – |
| 515-386 | Jefferson Tel | Phone company | – |
| 515-391 | Verizon Wireless | Mobile carrier | – |
| 515-796 | T-Mobile (including Sprint) | 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.