Phone numbers in Green Lake, Wisconsin
Green Lake has 6 phone prefixes in area code 920.
Biggest holders: AT&T Mobility, UScellular, Brightspeed Of North Central Wisconsin. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Local phone company 17%
- Internet / business phone carrier 17%
Every prefix in Green Lake
Search the first six digits of a number in this list. If it's here, the number started in Green Lake with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 920-229 | UScellular | Mobile carrier | – |
| 920-294 | Brightspeed Of North Central Wisconsin | Local phone company | – |
| 920-299 | AT&T Mobility | Mobile carrier | – |
| 920-329 | AT&T Mobility | Mobile carrier | – |
| 920-369 | AT&T Mobility | Mobile carrier | – |
| 920-807 | Charter / Spectrum | Internet / business phone carrier | 2007 |
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.