Phone numbers in Keenesburg, Colorado
Keenesburg has 13 phone prefixes in area codes 303, 720, 983.
Biggest holders: Bandwidth, Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 8%
- Internet / business phone carrier 92%
Every prefix in Keenesburg
Search the first six digits of a number in this list. If it's here, the number started in Keenesburg with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 303-578 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 303-616 | Onvoy | Internet / business phone carrier | 2021 |
| 303-732 | CenturyLink / Lumen | Local phone company | – |
| 720-336 | Bandwidth | Internet / business phone carrier | 2010 |
| 720-547 | Bandwidth | Internet / business phone carrier | 2018 |
| 720-580 | Bandwidth | Internet / business phone carrier | 2013 |
| 720-615 | Bandwidth | Internet / business phone carrier | 2020 |
| 720-702 | Onvoy | Internet / business phone carrier | 2020 |
| 720-729 | Bandwidth | Internet / business phone carrier | 2012 |
| 720-735 | Onvoy | Internet / business phone carrier | 2014 |
| 720-797 | Bandwidth | Internet / business phone carrier | 2019 |
| 720-918 | Vonage America | Internet / business phone carrier | 2022 |
| 983-666 | Onvoy | Internet / business phone carrier | 2026 |
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.