Area code
Area code 641 — Iowa
Iowa · in service since July 9, 2000
Area code 641 covers parts of Iowa. It was created from area code 515 on July 9, 2000 and no other code overlays it.
Local time in Iowa
Spam reports from Sep 23 – Oct 22, 2026
Average #278 of 461 codes
311 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls7 digits
- Prefixes605 assigned
- Runs out~1Q 2037
- Unwanted call?Block & report
Spam call reports about 641 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 11 |
| Sep 14 | 108 |
| Sep 21 | 123 |
| Sep 28 | 72 |
| Oct 5 | 50 |
| Oct 12 | 55 |
| Oct 19 (4 days) | 58 |
Compared with all codes
- Robocalls
- 85%all codes 75%
- Callers with the same code
- 25%all codes 35%
- Rank by complaints
- #278of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 561 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 146 31% | |
| Dropped call or no message | 49 10% | |
| Calls pretending to be government, businesses, or family and friends | 17 4% | |
| Medical & prescriptions | 15 3% | |
| Computer & technical support | 3 1% | |
| Lotteries, prizes & sweepstakes | 3 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Iowa | 128 27% | |
| California | 38 8% | |
| New York | 28 6% | |
| Florida | 22 5% | |
| Texas | 22 5% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 641 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| MASON CITY | Mason City | Cerro Gordo County | 20 |
| NEW HAVEN | New Haven | Mitchell County | 17 |
| MARSHALLTN | Marshalltown | Marshall County | 16 |
| OTTUMWA | Ottumwa | Wapello County | 15 |
| NEWHAMPTON | New Hampton | Chickasaw County | 12 |
| OSKALOOSA | Oskaloosa | Mahaska County | 12 |
| PELLA | Pella | spans 2 counties | 12 |
| CHARLES CY | Charles City | Floyd County | 11 |
| NEWTON | Newton | Jasper County | 10 |
| FAIRFIELD | Fairfield | Jefferson County | 9 |
Plus 213 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
Is 641 running out of numbers?
Previous forecast (October 2025): 2033, moved later by 4 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 641 prefixes
The five largest of 75 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Windstream Iowa Communications, Inc. | 60 10% | |
| Verizon Wireless | 46 8% | |
| United States Cellular | 39 6% | |
| Windstream Iowa Communications, Inc. - North | 32 5% | |
| Qwest Corporation | 30 5% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 641
What area code is 641?
An Iowa area code, in service since July 9, 2000.
Where is 641 area code, and what time zone is it in?
Iowa; Central Time.
Why am I getting spam calls from 641?
311 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 641 get a new area code?
NANPA forecasts exhaust in 1Q 2037; no relief planning listed.