Phone numbers in Billings, Montana
Billings has 72 phone prefixes in area code 406.
Biggest holders: CenturyLink / Lumen, Verizon Wireless, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 31%
- Local phone company 26%
- Internet / business phone carrier 36%
- Phone company 7%
Every prefix in Billings
Search the first six digits of a number in this list. If it's here, the number started in Billings with the carrier shown. If it isn't, check the Montana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 406-200 | Teleport Communications America Mt | Internet / business phone carrier | 2012 |
| 406-206 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 406-208 | AT&T Mobility | Mobile carrier | 2001 |
| 406-237 | CenturyLink / Lumen | Local phone company | – |
| 406-238 | CenturyLink / Lumen | Local phone company | – |
| 406-245 | CenturyLink / Lumen | Local phone company | – |
| 406-247 | CenturyLink / Lumen | Local phone company | – |
| 406-248 | CenturyLink / Lumen | Local phone company | – |
| 406-252 | CenturyLink / Lumen | Local phone company | – |
| 406-254 | CenturyLink / Lumen | Local phone company | – |
| 406-255 | CenturyLink / Lumen | Local phone company | – |
| 406-256 | CenturyLink / Lumen | Local phone company | – |
| 406-259 | CenturyLink / Lumen | Local phone company | – |
| 406-272 | Onvoy | Internet / business phone carrier | – |
| 406-281 | Teleport Communications America Mt | Internet / business phone carrier | – |
| 406-294 | Allstream | Internet / business phone carrier | – |
| 406-318 | Onvoy | Internet / business phone carrier | 2011 |
| 406-325 | Nuso | Internet / business phone carrier | – |
| 406-371 | MCImetro (Verizon Business) | Internet / business phone carrier | 2004 |
| 406-373 | CenturyLink / Lumen | Local phone company | – |
| 406-384 | Allstream | Internet / business phone carrier | – |
| 406-409 | Csc Wireless | Mobile carrier | 2019 |
| 406-412 | Onvoy | Internet / business phone carrier | 2017 |
| 406-413 | CenturyLink / Lumen | Local phone company | 2015 |
| 406-435 | TDS Metrocom | Phone company | – |
| 406-500 | Fractel | Internet / business phone carrier | 2019 |
| 406-503 | Comcast | Internet / business phone carrier | 2023 |
| 406-506 | Hd Carrier | Internet / business phone carrier | 2020 |
| 406-534 | Charter / Spectrum | Internet / business phone carrier | – |
| 406-545 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 406-561 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 406-591 | Verizon Wireless | Mobile carrier | – |
| 406-598 | Verizon Wireless | Mobile carrier | – |
| 406-601 | Blackfoot Communications | Phone company | 2013 |
| 406-606 | Tri Tel | Phone company | 2012 |
| 406-608 | IP Horizon | Internet / business phone carrier | 2021 |
| 406-617 | AT&T Mobility | Mobile carrier | 2024 |
| 406-620 | Sagebrush Cellular | Mobile carrier | 2005 |
| 406-647 | Bandwidth | Internet / business phone carrier | 2008 |
| 406-651 | CenturyLink / Lumen | Local phone company | – |
| 406-652 | CenturyLink / Lumen | Local phone company | – |
| 406-655 | CenturyLink / Lumen | Local phone company | – |
| 406-656 | CenturyLink / Lumen | Local phone company | – |
| 406-657 | CenturyLink / Lumen | Local phone company | – |
| 406-661 | Verizon Wireless | Mobile carrier | – |
| 406-670 | Verizon Wireless | Mobile carrier | – |
| 406-671 | Verizon Wireless | Mobile carrier | – |
| 406-672 | Verizon Wireless | Mobile carrier | – |
| 406-690 | Verizon Wireless | Mobile carrier | – |
| 406-694 | Verizon Wireless | Mobile carrier | 2005 |
| 406-696 | Verizon Wireless | Mobile carrier | 2006 |
| 406-697 | Verizon Wireless | Mobile carrier | 2005 |
| 406-698 | Verizon Wireless | Mobile carrier | – |
| 406-702 | Charter / Spectrum | Internet / business phone carrier | 2012 |
| 406-717 | Vonage America | Internet / business phone carrier | 2018 |
| 406-794 | Onvoy | Internet / business phone carrier | 2006 |
| 406-831 | Telnyx | Internet / business phone carrier | 2016 |
| 406-839 | Charter / Spectrum | Internet / business phone carrier | 2006 |
| 406-850 | AT&T Mobility | Mobile carrier | – |
| 406-855 | AT&T Mobility | Mobile carrier | – |
| 406-860 | AT&T Mobility | Mobile carrier | – |
| 406-861 | AT&T Mobility | Mobile carrier | – |
| 406-867 | Wavenation | Phone company | – |
| 406-869 | Allstream | Internet / business phone carrier | – |
| 406-876 | Verizon Wireless | Mobile carrier | – |
| 406-894 | Commio | Internet / business phone carrier | – |
| 406-896 | CenturyLink / Lumen | Local phone company | – |
| 406-901 | Onvoy | Internet / business phone carrier | 2021 |
| 406-927 | AT&T Mobility | Mobile carrier | 2010 |
| 406-969 | Skyetel | Internet / business phone carrier | – |
| 406-970 | CenturyLink / Lumen | Local phone company | 2016 |
| 406-998 | Airus | Phone company | 2015 |
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.