Area code
Area code 712 — Sioux City, IA
Iowa · in service since 1947
Area code 712 covers parts of Iowa; the place with the most of its prefixes is Sioux City. No other area code overlays it.
Local time in Sioux City
Spam reports from Sep 23 – Oct 22, 2026
Average #272 of 461 codes
322 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls7 digits
- Prefixes656 assigned
- Runs out~2Q 2039
- Unwanted call?Block & report
Spam call reports about 712 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 7 |
| Sep 14 | 69 |
| Sep 21 | 78 |
| Sep 28 | 77 |
| Oct 5 | 61 |
| Oct 12 | 75 |
| Oct 19 (4 days) | 66 |
Compared with all codes
- Robocalls
- 81%all codes 75%
- Callers with the same code
- 38%all codes 35%
- Rank by complaints
- #272of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 1317 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 147 34% | |
| Calls pretending to be government, businesses, or family and friends | 42 10% | |
| Medical & prescriptions | 32 7% | |
| Dropped call or no message | 21 5% | |
| Warranties & protection plans | 7 2% | |
| Lotteries, prizes & sweepstakes | 3 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Iowa | 184 42% | |
| California | 29 7% | |
| Florida | 26 6% | |
| New York | 16 4% | |
| Georgia | 15 3% |
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 712 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| SIOUX CITY | Sioux City | spans 2 counties | 73 |
| COUNCILBLF | Council Bluffs | Pottawattamie County | 29 |
| SERGENTBLF | Sergeant Bluff | Woodbury County | 13 |
| SPENCER | Spencer | Clay County | 11 |
| LE MARS | Le Mars | Plymouth County | 10 |
| CARROLL | Carroll | Carroll County | 9 |
| HARLAN | Harlan | Shelby County | 8 |
| STORM LAKE | Storm Lake | Buena Vista County | 8 |
| ATLANTIC | Atlantic | Cass County | 7 |
| DENISON | Denison | Crawford County | 7 |
Plus 234 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Iowa
- Assigned by NANPA
- 1947
- Local dialing
- 7 digits (NANPA: 7D)
Source: NANPA, NPA database of Oct 24, 2026.
Is 712 running out of numbers?
Previous forecast (October 2025): 2040, moved earlier by 1 year.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 712 prefixes
The five largest of 114 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Verizon Wireless | 68 10% | |
| Qwest Corporation | 64 10% | |
| Windstream Iowa Communications, Inc. - North | 48 7% | |
| New Cingular Wireless PCS, LLC | 43 7% | |
| Onvoy, LLC | 31 5% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 712
What area code is 712?
An Iowa area code, in service since 1947.
Where is 712 area code, and what time zone is it in?
Sioux City, IA; Central Time.
Why am I getting spam calls from 712?
322 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 712 get a new area code?
NANPA forecasts exhaust in 2Q 2039; no relief planning listed.