Phone numbers in Greenfield, Iowa
Greenfield has 4 phone prefixes in area code 641.
Biggest holders: Windstream Iowa Communications, Inc. - Systems, UScellular. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 75%
Every prefix in Greenfield
Search the first six digits of a number in this list. If it's here, the number started in Greenfield with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 641-212 | Windstream Iowa Communications, Inc. - Systems | Local phone company | 2015 |
| 641-221 | UScellular | Mobile carrier | 2003 |
| 641-343 | Windstream Iowa Communications, Inc. - Systems | Local phone company | – |
| 641-743 | 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.