Phone numbers in Holmen, Wisconsin
Holmen has 4 phone prefixes in area code 608.
Biggest holders: Brightspeed Of Central Wisconsin, AT&T Mobility, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 50%
Every prefix in Holmen
Search the first six digits of a number in this list. If it's here, the number started in Holmen with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 608-399 | Brightspeed Of Central Wisconsin | Local phone company | 2001 |
| 608-526 | Brightspeed Of Central Wisconsin | Local phone company | – |
| 608-540 | AT&T Mobility | Mobile carrier | 2018 |
| 608-952 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
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.