Phone numbers in Green Bay, Wisconsin
Green Bay has 115 phone prefixes in area codes 274, 920.
Biggest holders: AT&T (local phone), Cellcom, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 18%
- Local phone company 30%
- Internet / business phone carrier 28%
- Paging service 4%
- Phone company 20%
Every prefix in Green Bay
Search the first six digits of a number in this list. If it's here, the number started in Green Bay with the carrier shown. If it isn't, check the Wisconsin page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 274-207 | Leap Telecom | Phone company | 2024 |
| 274-218 | Wavenation | Phone company | 2025 |
| 274-222 | Ahoi | Phone company | 2026 |
| 274-300 | Lte Wireless | Mobile carrier | 2026 |
| 920-217 | T-Mobile (including Sprint) | Mobile carrier | – |
| 920-227 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 920-246 | Verizon Wireless | Mobile carrier | – |
| 920-247 | Vonage America | Internet / business phone carrier | 2017 |
| 920-264 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 920-265 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 920-271 | TDS Metrocom | Phone company | – |
| 920-272 | Net Lec | Phone company | – |
| 920-283 | Peerless Network Of Wisconsin | Internet / business phone carrier | 2016 |
| 920-288 | AT&T (local phone) | Local phone company | 2001 |
| 920-301 | Onvoy | Internet / business phone carrier | 2016 |
| 920-305 | Onvoy | Internet / business phone carrier | – |
| 920-321 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 920-327 | AT&T (local phone) | Local phone company | 2002 |
| 920-328 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 920-360 | UScellular | Mobile carrier | – |
| 920-362 | UScellular | Mobile carrier | – |
| 920-366 | UScellular | Mobile carrier | – |
| 920-370 | UScellular | Mobile carrier | – |
| 920-371 | T-Mobile (including Sprint) | Mobile carrier | – |
| 920-384 | Hd Carrier | Internet / business phone carrier | 2020 |
| 920-391 | AT&T (local phone) | Local phone company | – |
| 920-393 | Charter / Spectrum | Internet / business phone carrier | 2010 |
| 920-396 | AT&T Mobility | Mobile carrier | 2017 |
| 920-401 | Integrated Path Communications | Phone company | 2018 |
| 920-405 | AT&T (local phone) | Local phone company | – |
| 920-406 | AT&T (local phone) | Local phone company | – |
| 920-412 | UScellular | Mobile carrier | – |
| 920-417 | Airespring | Phone company | 2020 |
| 920-429 | AT&T (local phone) | Local phone company | – |
| 920-430 | AT&T (local phone) | Local phone company | – |
| 920-431 | AT&T (local phone) | Local phone company | – |
| 920-432 | AT&T (local phone) | Local phone company | – |
| 920-433 | AT&T (local phone) | Local phone company | – |
| 920-434 | AT&T (local phone) | Local phone company | – |
| 920-435 | AT&T (local phone) | Local phone company | – |
| 920-436 | AT&T (local phone) | Local phone company | – |
| 920-437 | AT&T (local phone) | Local phone company | – |
| 920-438 | AT&T (local phone) | Local phone company | – |
| 920-440 | Spok | Paging service | – |
| 920-444 | AT&T (local phone) | Local phone company | – |
| 920-445 | AT&T (local phone) | Local phone company | – |
| 920-448 | AT&T (local phone) | Local phone company | – |
| 920-455 | AT&T (local phone) | Local phone company | – |
| 920-461 | Verizon Wireless | Mobile carrier | 2012 |
| 920-465 | AT&T (local phone) | Local phone company | – |
| 920-466 | Hd Carrier | Internet / business phone carrier | 2025 |
| 920-468 | AT&T (local phone) | Local phone company | – |
| 920-469 | AT&T (local phone) | Local phone company | – |
| 920-471 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 920-480 | IP Horizon | Internet / business phone carrier | 2021 |
| 920-489 | Nuso | Internet / business phone carrier | 2013 |
| 920-490 | AT&T (local phone) | Local phone company | – |
| 920-491 | AT&T (local phone) | Local phone company | – |
| 920-492 | AT&T (local phone) | Local phone company | – |
| 920-494 | AT&T (local phone) | Local phone company | – |
| 920-496 | AT&T (local phone) | Local phone company | – |
| 920-497 | AT&T (local phone) | Local phone company | – |
| 920-498 | AT&T (local phone) | Local phone company | – |
| 920-499 | AT&T (local phone) | Local phone company | – |
| 920-501 | AT&T Mobility | Mobile carrier | 2019 |
| 920-510 | Onvoy | Internet / business phone carrier | 2019 |
| 920-530 | AT&T Mobility | Mobile carrier | 2008 |
| 920-544 | Charter / Spectrum | Internet / business phone carrier | – |
| 920-548 | TDS Metrocom | Phone company | 2002 |
| 920-556 | American Messaging Services | Paging service | – |
| 920-562 | AT&T Mobility | Mobile carrier | 2003 |
| 920-569 | Windstream (PAETEC) | Internet / business phone carrier | 2002 |
| 920-592 | AT&T (local phone) | Local phone company | – |
| 920-593 | MCImetro (Verizon Business) | Internet / business phone carrier | 2003 |
| 920-600 | Onvoy | Internet / business phone carrier | 2015 |
| 920-606 | Cellcom | Phone company | – |
| 920-609 | Cellcom | Phone company | – |
| 920-610 | Windstream (PAETEC) | Internet / business phone carrier | 2022 |
| 920-613 | Cellcom | Phone company | – |
| 920-615 | Cellcom | Phone company | – |
| 920-617 | Net Lec | Phone company | – |
| 920-619 | Cellcom | Phone company | – |
| 920-621 | Cellcom | Phone company | – |
| 920-634 | Teleport Communications America, LLC Wi | Internet / business phone carrier | – |
| 920-639 | Cellcom | Phone company | – |
| 920-641 | Peninsula Fiber Network | Internet / business phone carrier | 2021 |
| 920-655 | Cellcom | Phone company | – |
| 920-660 | Cellcom | Phone company | – |
| 920-661 | AT&T (local phone) | Local phone company | – |
| 920-662 | AT&T (local phone) | Local phone company | – |
| 920-664 | AT&T Mobility | Mobile carrier | – |
| 920-665 | Spok | Paging service | – |
| 920-676 | Cellcom | Phone company | – |
| 920-680 | Cellcom | Phone company | – |
| 920-704 | American Messaging Services | Paging service | – |
| 920-705 | American Messaging Services | Paging service | – |
| 920-712 | TDS Metrocom | Phone company | – |
| 920-713 | TDS Metrocom | Phone company | – |
| 920-719 | Tpx Communications | Internet / business phone carrier | 2026 |
| 920-737 | Verizon Wireless | Mobile carrier | – |
| 920-770 | Peerless Network Of Wisconsin | Internet / business phone carrier | 2014 |
| 920-777 | Onvoy | Internet / business phone carrier | 2015 |
| 920-784 | Onvoy | Internet / business phone carrier | 2006 |
| 920-785 | Onvoy | Internet / business phone carrier | 2008 |
| 920-819 | AT&T Mobility | Mobile carrier | 2001 |
| 920-857 | Verizon Wireless | Mobile carrier | 2006 |
| 920-873 | Twilio | Internet / business phone carrier | 2021 |
| 920-883 | AT&T (local phone) | Local phone company | – |
| 920-884 | TDS Metrocom | Phone company | – |
| 920-888 | Telnyx | Internet / business phone carrier | – |
| 920-930 | Commio | Internet / business phone carrier | 2019 |
| 920-932 | Fractel | Internet / business phone carrier | 2020 |
| 920-940 | Bug Tussel Wireless | Mobile carrier | 2008 |
| 920-965 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 920-977 | MetroPCS (T-Mobile) | Mobile carrier | 2018 |
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.