712 Area Code — Sioux City, IA
Area code 712 serves Sioux City and 3 other cities in Iowa. Local time follows America/Chicago. It has no overlay codes.
- State
- Iowa
- Primary city
- Sioux City
- Timezone
- America/Chicago
- In service since
- 1947
- Type
- Geographic
- Overlay codes
- None
Cities Served by 712
The 712 area code covers 4 cities and communities in Iowa.
- Sioux City
- Council Bluffs
- Spencer
- Storm Lake
About Area Code 712
Area code 712 is a North American Numbering Plan (NANP) area code that has been in service since 1947. It is administered by NANPA on behalf of the FCC and serves the Iowa region anchored on Sioux City.
712 is currently a single-coverage geographic area code with no overlays. This means a 7-digit number in this area code is unique within its rate centers, though best-practice is always to dial the full 10-digit number when contacting a 712 line.
Mobile numbers in 712 are portable: a person who moved away from Sioux City may still carry a 712 mobile number on their device. If you receive an unexpected call from a 712 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Iowa, you may also interact with neighbouring or overlay codes. See the related codes section below to explore the rest of Iowa.
Other Iowa Area Codes
Continue exploring the Iowa numbering plan.
712 Area Code FAQ
Where is area code 712?
Area code 712 is located in Iowa, primarily serving Sioux City and surrounding cities including Council Bluffs, Spencer, Storm Lake. The region operates on CT (America/Chicago) time.
What state is 712 area code?
712 is a Iowa area code. It was put into service in 1947 and has no overlay codes — it covers its geographic area exclusively.
Is 712 a scam area code?
712 is a legitimate North American area code allocated by NANPA to Iowa. Like any geographic area code, scammers sometimes spoof 712 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 712 use?
Area code 712 operates on CT (America/Chicago). Numbers in this area code follow standard Iowa time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 712 phone number?
Yes. Use the reverse lookup widget above to enter a full 712 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.