Phone numbers in Sturgeon Bay, Wisconsin
Sturgeon Bay has 12 phone prefixes in area code 920.
Biggest holders: T-Mobile (including Sprint), Cellcom, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 17%
- Internet / business phone carrier 25%
- Phone company 25%
Every prefix in Sturgeon Bay
Search the first six digits of a number in this list. If it's here, the number started in Sturgeon Bay with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 920-256 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 920-333 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 920-473 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 920-493 | Cellcom | Phone company | – |
| 920-495 | Cellcom | Phone company | – |
| 920-559 | UScellular | Mobile carrier | – |
| 920-603 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 920-695 | Onvoy | Internet / business phone carrier | 2003 |
| 920-724 | Net Lec | Phone company | – |
| 920-743 | AT&T (local phone) | Local phone company | – |
| 920-746 | AT&T (local phone) | Local phone company | – |
| 920-818 | Charter / Spectrum | Internet / business phone carrier | 2005 |
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.