Phone numbers in Anamosa, Iowa
Anamosa has 9 phone prefixes in area code 319.
Biggest holders: UScellular, Teleport Communications America, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 44%
- Local phone company 11%
- Internet / business phone carrier 33%
- Phone company 11%
Every prefix in Anamosa
Search the first six digits of a number in this list. If it's here, the number started in Anamosa with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 319-251 | Teleport Communications America | Internet / business phone carrier | 2017 |
| 319-315 | Onvoy | Internet / business phone carrier | 2021 |
| 319-405 | Bandwidth | Internet / business phone carrier | 2022 |
| 319-425 | Martelle Comm Coop Ia | Phone company | 2008 |
| 319-462 | CenturyLink / Lumen | Local phone company | – |
| 319-480 | UScellular | Mobile carrier | – |
| 319-481 | Verizon Wireless | Mobile carrier | – |
| 319-821 | T-Mobile (including Sprint) | Mobile carrier | – |
| 319-975 | UScellular | Mobile carrier | 2014 |
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.