Phone numbers in Colby, Kansas
Colby has 7 phone prefixes in area code 785.
Biggest holders: AT&T (local phone), Level 3 (Lumen), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 29%
- Local phone company 29%
- Internet / business phone carrier 29%
- Phone company 14%
Every prefix in Colby
Search the first six digits of a number in this list. If it's here, the number started in Colby with the carrier shown. If it isn't, check the Kansas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 785-269 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 785-443 | Verizon Wireless | Mobile carrier | 2002 |
| 785-460 | S & T Communications | Phone company | 2001 |
| 785-462 | AT&T (local phone) | Local phone company | – |
| 785-465 | AT&T (local phone) | Local phone company | – |
| 785-583 | Nex-tech Wireless | Mobile carrier | 2023 |
| 785-785 | Onvoy | Internet / business phone carrier | 2022 |
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.