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Area code 712

Area code 712 Sioux City, Iowa

Area code 712 is one of the original 1947 area codes, in Iowa, with numbers assigned in Sioux City, Council Bluffs, Sergeant Bluff and 229 more places. It’s 11:10 PM there now.

State
Iowa5 area codes in Iowa
Time zone
Central11:10 PM there now
Exchanges
633232 places
Overlay
NoneThe only code for its area
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Where area code 712 is

Numbers in 712 are assigned to 232 places in 32 counties: Woodbury County, Plymouth County, Pottawattamie County, Sioux County, Carroll County, Shelby County, plus 26 more.

No single place dominates: Sioux City, the largest, has 12% of the exchanges.

  • Sioux City73
  • Council Bluffs29
  • Sergeant Bluff13
  • Spencer11
  • Le Mars10
  • Carroll9
  • Storm Lake8
  • Harlan8
  • Atlantic7
  • Denison7
  • Red Oak7
  • Onawa6
  • Cherokee6
  • Emmetsburg6
  • Spirit Lake6
  • Mapleton5
  • Estherville5
  • Shenandoah5
  • Carter Lake5
  • Rockwell City5
  • Ida Grove5
  • Glenwood5
  • Clarinda5
  • Orange City5

Phone companies in 712

633 blocks of numbers in 712 are held by 103 phone companies. The most belong to Windstream (83), Verizon Wireless (68) and Lumen (CenturyLink) (66).

A mix: about 24% wireless, 48% local phone and cable and 28% other carriers, including internet phone services.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

712 has been in service since 1947, when the first North American area codes were set up.

76 new exchanges were assigned since 2021, the latest in August 2026.

Calling 712

It’s 11:10 PM Central time in 712 right now.

From elsewhere in the U.S., dial 1, 712 and the 7-digit number.

Nearby area codes

Iowa has 5 area codes: 319, 515, 563, 641 and 712.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 712 area code

Map of the 712 area code around Sioux City, Council Bluffs and Sergeant Bluff, Iowa.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 712

Where is area code 712?

In Iowa, covering Sioux City, Council Bluffs and Sergeant Bluff and other places across 32 counties.

What time zone is 712 in?

Central time. It was 11:10 PM there when this page loaded.

Is 712 an overlay?

No. 712 is the only area code for its area right now.

Which phone companies have 712 numbers?

103 companies hold blocks; the most belong to Windstream, Verizon Wireless and Lumen (CenturyLink). About 24% of blocks are wireless.

Is 712 running out of numbers?

Not on record. 76 new exchanges have been assigned since 2021.