Phone numbers in Ftatkinson, Wisconsin
Ftatkinson has 10 phone prefixes in area code 920.
Biggest holders: UScellular, Onvoy, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 20%
- Internet / business phone carrier 40%
Every prefix in Ftatkinson
Search the first six digits of a number in this list. If it's here, the number started in Ftatkinson with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 920-308 | Onvoy | Internet / business phone carrier | 2017 |
| 920-397 | AT&T Mobility | Mobile carrier | 2001 |
| 920-542 | Teleport Communications America, LLC Wi | Internet / business phone carrier | 2002 |
| 920-563 | AT&T (local phone) | Local phone company | – |
| 920-568 | AT&T (local phone) | Local phone company | – |
| 920-691 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 920-723 | UScellular | Mobile carrier | – |
| 920-728 | UScellular | Mobile carrier | 2001 |
| 920-817 | UScellular | Mobile carrier | 2021 |
| 920-951 | Onvoy | Internet / business phone carrier | 2023 |
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.