Area Code 712: Sioux City, Iowa
712 is a telephone area code serving Iowa, including Sioux City, Council Bluffs. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 712 are located in Iowa, United States (NANP region: West). The code covers Sioux City, Council Bluffs.
How to Dial Area Code 712
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 712 XXX-XXXX (10-digit dialing: 712 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 712 XXX XXXX |
| From Australia | 0011 1 712 XXX XXXX |
| From a mobile phone anywhere | +1 712 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 712 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 712
Calls to a 712 number ring in the America/Chicago time zone, standard offset UTC-06:00. Daylight saving time applies here, so the offset moves forward one hour from March to November.
Cities and Communities Served by 712
The following places fall inside the 712 calling area:
Other Area Codes in Iowa
These codes also serve Iowa. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|---|
| 319 | Cedar Rapids, Iowa City |
| 515 | Des Moines |
| 563 | Davenport, Dubuque |
| 641 | Mason City, Ottumwa |
See all 5 area codes in Iowa →
Frequently Asked Questions
Where is area code 712?
Area code 712 is in Iowa, United States. It covers Sioux City, Council Bluffs.
What time zone is area code 712 in?
Area code 712 rings in the America/Chicago time zone (UTC-06:00 standard).
Do I need to dial 1 before area code 712?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 712, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 712.
Is area code 712 toll-free?
No. 712 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.