Area code 641: where it is and who calls from it
Area code 641 is in Iowa.
Iowa (Mason City, Oskaloosa, Creston, Pella, Ottumwa, Britt, Clear Lake, Fairfield, and parts of central Iowa)
| Where | Iowa |
|---|---|
| Time zone | Central Time ยท local time |
| In service since | 2000 |
| Overlay | No |
| Prefixes assigned | 584 of 792 possible (74%) |
Where 641 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 641, with how many prefixes each has.
Plus 162 smaller rate centers.
Who holds 641 numbers
- Mobile carrier 25%
- Local phone company 39%
- Internet / business phone carrier 18%
- Phone company 18%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| Windstream Iowa Communications | Local phone company | 60 | 10% |
| Onvoy | Internet / business phone carrier | 51 | 9% |
| Verizon Wireless | Mobile carrier | 46 | 8% |
| UScellular | Mobile carrier | 39 | 7% |
| Windstream Iowa Communications, Inc. - North | Local phone company | 32 | 5% |
| CenturyLink / Lumen | Local phone company | 31 | 5% |
| AT&T Mobility | Mobile carrier | 28 | 5% |
| Windstream Iowa Communications, Inc. - Systems | Local phone company | 28 | 5% |
| Farmers Tel | Phone company | 28 | 5% |
| T-Mobile (including Sprint) | Mobile carrier | 23 | 4% |
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.
States served: Iowa.
Other area codes in Iowa
Got a call from 641?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 641 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.