Phone numbers in Platteville, Colorado
Platteville has 4 phone prefixes in area code 970.
Biggest holders: CenturyLink / Lumen, Onvoy, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 50%
- Internet / business phone carrier 50%
Every prefix in Platteville
Search the first six digits of a number in this list. If it's here, the number started in Platteville with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-598 | CenturyLink / Lumen | Local phone company | 2014 |
| 970-703 | Onvoy | Internet / business phone carrier | – |
| 970-785 | CenturyLink / Lumen | Local phone company | – |
| 970-934 | Bandwidth | 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.