Phone numbers in Winfield, Kansas
Winfield has 10 phone prefixes in area code 620.
Biggest holders: AT&T (local phone), Verizon Wireless, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 30%
- Local phone company 40%
- Internet / business phone carrier 30%
Every prefix in Winfield
Search the first six digits of a number in this list. If it's here, the number started in Winfield with the carrier shown. If it isn't, check the Kansas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 620-218 | Verizon Wireless | Mobile carrier | 2003 |
| 620-221 | AT&T (local phone) | Local phone company | – |
| 620-222 | AT&T (local phone) | Local phone company | – |
| 620-229 | AT&T (local phone) | Local phone company | – |
| 620-262 | T-Mobile (including Sprint) | Mobile carrier | – |
| 620-301 | Comcast | Internet / business phone carrier | 2017 |
| 620-402 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 620-590 | AT&T Mobility | Mobile carrier | 2022 |
| 620-705 | AT&T (local phone) | Local phone company | 2001 |
| 620-880 | Commio | Internet / business phone carrier | 2023 |
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.