Area code 712 covers Sioux City and surrounding areas in Iowa. It is one of the original 86 area codes established by AT&T in 1947. For the full picture, see all Iowa area codes.
| State | Iowa |
|---|---|
| Primary city | Sioux City |
| Cities also served | Sioux City, Council Bluffs, Spencer, Storm Lake, Le Mars, Carroll, Denison, Red Oak |
| Time zone | Central (UTC-6 / UTC-5 DST) |
| Year established | January 1, 1947 |
| Original 1947 NPA? | Yes |
| Overlay codes | None |
| Currently in use? | Yes, actively assigned |
| Ten-digit dialing required? | Local seven-digit dialing may still apply |
Cities Served by Area Code 712
Area code 712 serves Western Iowa — approximately 32 counties from the Nebraska border to the Minnesota line, including the Missouri River corridor and Loess Hills, including the following cities and communities:
- Sioux City
- Council Bluffs
- Spencer
- Storm Lake
- Le Mars
- Carroll
- Denison
- Red Oak
Nearby area codes covering the same broader region include: 319, 515, 563, 641.
How to Get a 712 Phone Number
There are three ways to get a phone number with the 712 area code, each suited to a different need:
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Browse 712 Numbers →- Buy from a premium-number specialist. Companies that hold curated inventories of specific area codes can sell you a 712 number directly, often with a one-time fee and ownership transferred to you (no recurring carrier fees). This is the option for picking a specific memorable number, or for getting an area code that most carriers won’t let you request. Browse our 712 inventory.
- Sign up with a VoIP carrier. Voice-over-IP services (such as Google Voice, OpenPhone, Grasshopper, and many others) can typically provision a 712 number on request, especially for active overlay codes. You won’t usually get to pick the specific number, but you’ll get a working line in the area code. This is the cheapest option for anyone who doesn’t need a particular number.
- Port an existing 712 number. If you already have a 712 phone number with another carrier, you can transfer it (port it) to a new service provider while keeping the number. This works for landlines, cell phones, and VoIP services, though landlines outside of Iowa sometimes can’t accept inbound ports of 712 numbers due to 911 routing rules.
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Frequently Asked Questions
Is the 712 area code still in use?
Yes. 712 is actively assigned to new phone lines in Western Iowa — approximately 32 counties from the Nebraska border to the Minnesota line, including the Missouri River corridor and Loess Hills.
Can I get a 712 number if I don't live in Iowa?
Yes. Phone numbers are no longer tied to a physical address. With VoIP service or a number broker, you can hold a 712 number from anywhere in the world. The number routes to whatever device or carrier you specify.
Is 712 a scam area code?
No. 712 is a legitimate, active area code for Western Iowa — approximately 32 counties from the Nebraska border to the Minnesota line, including the Missouri River corridor and Loess Hills. Like any area code, scammers occasionally spoof 712 caller IDs, but the code itself is heavily used by real Iowa businesses, government offices, and residents.
Where is the 712 area code located?
Area code 712 covers the western portion of Iowa, including Sioux City, Council Bluffs, Spencer, Storm Lake, Le Mars, Carroll, Denison, and Red Oak, spanning approximately 32 counties along the Missouri River corridor.
Has area code 712 ever been split or overlaid?
No. Area code 712 is one of the few original 1947 NPAs in the United States that has never been split or received an overlay, owing to relatively low population density and modest demand for new numbers in western Iowa. NANPA projections indicate no relief will be needed until at least 2041.
Do I need to dial 10 digits for local calls in the 712 area code?
Because 712 has no overlay, seven-digit local dialing is still permitted within the area code. Ten-digit dialing (712 + seven digits) also works and is required for calls outside the NPA.
What other Iowa area codes border or neighbor 712?
Iowa’s other four area codes are 515 (central Iowa / Des Moines), 641 (north-central and south-central Iowa), 319 (eastern Iowa), and 563 (northeastern Iowa). None overlap with 712’s territory.
