Phone numbers in Sumner, Iowa
Sumner has 3 phone prefixes in area code 563.
Biggest holders: Windstream Iowa Communications, Inc. - Systems, Mcc Telephony. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 67%
- Internet / business phone carrier 33%
Every prefix in Sumner
Search the first six digits of a number in this list. If it's here, the number started in Sumner with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 563-233 | Mcc Telephony | Internet / business phone carrier | 2006 |
| 563-339 | Windstream Iowa Communications, Inc. - Systems | Local phone company | 2015 |
| 563-578 | Windstream Iowa Communications, Inc. - Systems | Local phone company | – |
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.