712 Area Code — Iowa
712 is a North American Numbering Plan area code for Iowa, the United States. It covers about 552,236 people in 252 towns and 265 ZIP codes, including Sioux City, Council Bluffs and Storm Lake.
| Field | Value |
|---|---|
| Area code | 712 |
| Country | United States (+1) |
| State / province | Iowa |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Central |
| Population covered | 552,236 |
| Towns covered | 252 |
| ZIP codes | 265 |
| Approx. centre | 42.191, -95.450 |
Where area code 712 is used
Area code 712 is assigned to Iowa, the United States, inside the North American Numbering Plan. Numbers in the code are written (712) NXX-XXXX at home and +1 712 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 712
The 252 towns below are the largest in the 712 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Sioux City | Woodbury County | 89,735 | 9 |
| Council Bluffs | Pottawattamie County | 72,590 | 3 |
| Storm Lake | Buena Vista County | 13,431 | 1 |
| Le Mars | Plymouth County | 12,808 | 1 |
| Spencer | Clay County | 12,638 | 1 |
| Carroll | Carroll County | 11,990 | 1 |
| Sioux Center | Sioux County | 9,970 | 1 |
| Denison | Crawford County | 9,692 | 1 |
| Glenwood | Mills County | 8,874 | 1 |
| Spirit Lake | Dickinson County | 8,653 | 1 |
| Atlantic | Cass County | 8,526 | 1 |
| Orange City | Sioux County | 7,324 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Woodbury County | 21 |
| Pottawattamie County | 18 |
| Sioux County | 13 |
| Crawford County | 12 |
| Plymouth County | 11 |
| Carroll County | 11 |
| Page County | 11 |
| Clay County | 10 |
| Shelby County | 10 |
| Harrison County | 10 |
| Monona County | 9 |
| Fremont County | 9 |
Nearby area codes
How to dial area code 712
- Within North America: 712 + 7-digit number (712-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 712, then the 7-digit number — for example 00 1 712 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 712?
712 is a North American Numbering Plan area code assigned to Iowa, the United States. It covers about 552,236 people in 252 towns.
Is 712 a US or Canadian area code?
712 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 712 in?
Area code 712 is in the Central time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.