Phone numbers in Aspen, Colorado
Aspen has 17 phone prefixes in area code 970.
Biggest holders: CenturyLink / Lumen, Level 3 (Lumen), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 18%
- Local phone company 47%
- Internet / business phone carrier 24%
- Phone company 12%
Every prefix in Aspen
Search the first six digits of a number in this list. If it's here, the number started in Aspen with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-205 | CenturyLink / Lumen | Local phone company | 2001 |
| 970-236 | Zippytech Incorporated | Phone company | 2009 |
| 970-277 | San Isabel Telecom | Phone company | 2004 |
| 970-300 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 970-315 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 970-429 | CenturyLink / Lumen | Local phone company | – |
| 970-452 | AT&T Mobility | Mobile carrier | 2016 |
| 970-544 | CenturyLink / Lumen | Local phone company | – |
| 970-710 | T-Mobile (including Sprint) | Mobile carrier | – |
| 970-742 | AT&T Mobility | Mobile carrier | 2019 |
| 970-807 | Vonage America | Internet / business phone carrier | 2022 |
| 970-916 | Onvoy | Internet / business phone carrier | 2025 |
| 970-920 | CenturyLink / Lumen | Local phone company | – |
| 970-922 | CenturyLink / Lumen | Local phone company | – |
| 970-923 | CenturyLink / Lumen | Local phone company | – |
| 970-924 | CenturyLink / Lumen | Local phone company | 2007 |
| 970-925 | CenturyLink / Lumen | Local phone company | – |
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.