Phone numbers in Mount Ayr, Iowa
Mount Ayr has 4 phone prefixes in area code 641.
Biggest holders: Chat Mobility, CenturyLink / Lumen, Windstream Iowa Communications. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 50%
- Internet / business phone carrier 25%
- Phone company 25%
Every prefix in Mount Ayr
Search the first six digits of a number in this list. If it's here, the number started in Mount Ayr with the carrier shown. If it isn't, check the Iowa page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 641-234 | Chat Mobility | Phone company | 2003 |
| 641-321 | CenturyLink / Lumen | Local phone company | 2017 |
| 641-464 | Windstream Iowa Communications | Local phone company | – |
| 641-503 | Onvoy | Internet / business phone carrier | – |
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.