Phone numbers in Montello, Wisconsin
Montello has 4 phone prefixes in area codes 353, 608.
Biggest holders: AT&T Mobility, Onvoy, Frontier. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 25%
- Internet / business phone carrier 25%
Every prefix in Montello
Search the first six digits of a number in this list. If it's here, the number started in Montello with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 353-333 | Onvoy | Internet / business phone carrier | 2025 |
| 608-297 | Frontier | Local phone company | – |
| 608-494 | AT&T Mobility | Mobile carrier | – |
| 608-818 | AT&T Mobility | 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.