Phone numbers in Caldwell, Idaho
Caldwell has 15 phone prefixes in area codes 208, 986.
Biggest holders: CenturyLink / Lumen, Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 7%
- Local phone company 27%
- Internet / business phone carrier 67%
Every prefix in Caldwell
Search the first six digits of a number in this list. If it's here, the number started in Caldwell with the carrier shown. If it isn't, check the Idaho page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 208-402 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 208-453 | CenturyLink / Lumen | Local phone company | – |
| 208-454 | CenturyLink / Lumen | Local phone company | – |
| 208-455 | CenturyLink / Lumen | Local phone company | – |
| 208-459 | CenturyLink / Lumen | Local phone company | – |
| 208-504 | Onvoy | Internet / business phone carrier | 2016 |
| 208-614 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 208-649 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 208-779 | Onvoy | Internet / business phone carrier | 2003 |
| 208-795 | Allstream | Internet / business phone carrier | 2001 |
| 986-201 | Teleport Communications America | Internet / business phone carrier | 2019 |
| 986-204 | Bandwidth | Internet / business phone carrier | 2021 |
| 986-276 | Onvoy | Internet / business phone carrier | 2024 |
| 986-286 | Onvoy | Internet / business phone carrier | 2022 |
| 986-306 | AT&T Mobility | Mobile 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.