Phone numbers in Steamboat Springs, Colorado
Steamboat Springs has 14 phone prefixes in area code 970.
Biggest holders: CenturyLink / Lumen, T-Mobile (including Sprint), Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 43%
- Internet / business phone carrier 21%
Every prefix in Steamboat Springs
Search the first six digits of a number in this list. If it's here, the number started in Steamboat Springs with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-291 | T-Mobile (including Sprint) | Mobile carrier | – |
| 970-367 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 970-421 | AT&T Mobility | Mobile carrier | – |
| 970-439 | AT&T (local phone) | Local phone company | 2005 |
| 970-457 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 970-734 | Union Telephone | Local phone company | – |
| 970-761 | Onvoy | Internet / business phone carrier | – |
| 970-819 | Verizon Wireless | Mobile carrier | – |
| 970-846 | Verizon Wireless | Mobile carrier | – |
| 970-870 | CenturyLink / Lumen | Local phone company | – |
| 970-871 | CenturyLink / Lumen | Local phone company | – |
| 970-875 | CenturyLink / Lumen | Local phone company | – |
| 970-879 | CenturyLink / Lumen | Local phone company | – |
| 970-896 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
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.