Iowa Area Codes
Directory of all 5 telephone area codes assigned to Iowa.
Iowa phone numbers are served by 5 area codes operating in the Central timezone.10-digit or 7-digit local dialing applies depending on the exact number. No area codes in Iowa are currently flagged as high-risk scams.
Most populated prefix: area code 515 (Iowa)
All Area Codes in Iowa
Area Code 319
Cedar Rapids, Iowa City, Waterloo, Marion, Cedar Falls, Coralville, Burlington, North Liberty, Waverly, Fort Madison
Area Code 515
Des Moines, Ankeny, West Des Moines, Ames, Urbandale, Waukee, Johnston, Fort Dodge, Altoona, Clive
Area Code 563
Davenport, Dubuque, Bettendorf, Clinton, Muscatine, Decorah, Eldridge, Asbury, Maquoketa, Dewitt
Area Code 641
Marshalltown, Mason City, Ottumwa, Newton, Norwalk, Oskaloosa, Pella, Grinnell, Fairfield, Clear Lake
Area Code 712
Sioux City, Council Bluffs, Storm Lake, Spencer, Le Mars, Carroll, Sioux Center, Denison, Atlantic, Orange City
Major Cities Served by Iowa Area Codes
The most populous urban centers and census places covered by Iowa's area codes, ranked by population.
Iowa Area Code FAQs
Quick answers to common questions about Iowa telephone area codes.
How many area codes does Iowa have?
Iowa has 5 area codes: 319, 515, 563, 641, 712.
What timezone do Iowa area codes use?
Iowa area codes operate in the Central timezone.
What is the most populated area code in Iowa?
Area code 515 is the most populous prefix in Iowa based on covered city population.
Does Iowa use overlay area codes?
Iowa currently has no overlay code pairs listed in our directory.
Are there scam area codes in Iowa?
Iowa has no area codes currently flagged as high-risk scams.
About Iowa Area Codes & Phone Dialing Rules
When placing calls within Iowa, ten-digit dialing (area code + 7-digit telephone number) is required in overlay regions where multiple area codes serve the same geographic boundaries.