Phone numbers in Willmar, Minnesota
Willmar has 18 phone prefixes in area code 320.
Biggest holders: Verizon Wireless, CenturyLink / Lumen, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 22%
- Internet / business phone carrier 22%
- Phone company 6%
Every prefix in Willmar
Search the first six digits of a number in this list. If it's here, the number started in Willmar with the carrier shown. If it isn't, check the Minnesota page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 320-212 | Verizon Wireless | Mobile carrier | – |
| 320-214 | CenturyLink / Lumen | Local phone company | – |
| 320-220 | AT&T Mobility | Mobile carrier | – |
| 320-222 | Windstream En-tel | Local phone company | – |
| 320-231 | CenturyLink / Lumen | Local phone company | – |
| 320-235 | CenturyLink / Lumen | Local phone company | – |
| 320-262 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 320-263 | Verizon Wireless | Mobile carrier | 2003 |
| 320-295 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 320-403 | Teleport Communications America | Internet / business phone carrier | 2009 |
| 320-419 | Tekstar Communications | Phone company | 2019 |
| 320-441 | Onvoy | Internet / business phone carrier | 2002 |
| 320-444 | Verizon Wireless | Mobile carrier | 2005 |
| 320-463 | Nuso | Internet / business phone carrier | 2023 |
| 320-737 | TON80 Communications | Internet / business phone carrier | 2022 |
| 320-894 | Verizon Wireless | Mobile carrier | – |
| 320-905 | Verizon Wireless | Mobile carrier | – |
| 320-979 | Verizon Wireless | Mobile carrier | – |
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.