Phone numbers in DeForest, Wisconsin
DeForest has 5 phone prefixes in area codes 353, 608.
Biggest holders: Bandwidth, Brightspeed Of Western Wisconsin, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 40%
- Internet / business phone carrier 60%
Every prefix in DeForest
Search the first six digits of a number in this list. If it's here, the number started in DeForest with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 353-529 | Onvoy | Internet / business phone carrier | 2025 |
| 608-801 | Bandwidth | Internet / business phone carrier | 2022 |
| 608-842 | Brightspeed Of Western Wisconsin | Local phone company | – |
| 608-846 | Brightspeed Of Western Wisconsin | Local phone company | – |
| 608-912 | Bandwidth | Internet / business phone carrier | 2017 |
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.