| 319 | Iowa (Burlington, Iowa City, Cedar Rapids, Waterloo and east central and southeastern Iowa) More information at: Area Code 319 Phone Number Blocks |
| 515 | Iowa (Des Moines, Ames, Fort Dodge, Jefferson, Algona, Indianola and north central Iowa) More information at: Area Code 515 Phone Number Blocks |
| 563 | Iowa (Decorah, Dubuque, Clinton, Davenport and eastern and northeastern Iowa) More information at: Area Code 563 Phone Number Blocks |
| 641 | Iowa (Mason City, Oskaloosa, Creston, Pella, Ottumwa, Britt, Clear Lake, Fairfield and central Iowa) More information at: Area Code 641 Phone Number Blocks |
| 712 | Iowa (Estherville, Council Bluffs, Sioux City, Sheldon, Denison and western Iowa) More information at: Area Code 712 Phone Number Blocks |
