| Prefix | Primary City |
|---|---|
| 712-200 | Alta |
| 712-202 | Sioux City |
| 712-203 | Sioux City |
| 712-204 | Sioux City |
| 712-207 | Shelby |
| 712-208 | Mapleton |
| 712-209 | Estherville |
| 712-210 | Glidden |
| 712-212 | Sioux City |
| 712-213 | Storm Lake |
| 712-215 | Shenandoah |
| 712-216 | Logan |
| 712-219 | Onawa |
| 712-220 | Carroll |
| 712-221 | Cherokee |
| 712-222 | Sioux City |
| 712-223 | Sioux City |
| 712-224 | Sioux City |
| 712-225 | Cherokee |
| 712-226 | Sioux City |
| 712-227 | Crescent |
| 712-228 | Sergeant Bluff |
| 712-229 | Cherokee |
| 712-230 | Hospers |
| 712-231 | Hospers |
| 712-232 | Spencer |
| 712-233 | Sioux City |
| 712-234 | Sioux City |
| 712-235 | Harlan |
| 712-236 | Harlan |
| 712-237 | Sergeant Bluff |
| 712-238 | Sioux City |
| 712-239 | Sioux City |
| 712-240 | Greenville |
| 712-242 | Council Bluffs |
| 712-243 | Atlantic |
| 712-244 | Sioux City |
| 712-246 | Shenandoah |
| 712-247 | Sergeant Bluff |
| 712-248 | Carter Lake |
| 712-249 | Atlantic |
| 712-250 | Atlantic |
| 712-251 | Sioux City |
| 712-252 | Sioux City |
| 712-253 | Sioux City |
| 712-254 | Atlantic |
| 712-255 | Sioux City |
| 712-256 | Council Bluffs |
| 712-257 | Sergeant Bluff |
| 712-258 | Sioux City |
| 712-259 | Sioux City |
| 712-260 | Greenville |
| 712-261 | Cherokee |
| 712-262 | Greenville |
| 712-263 | Denison |
| 712-264 | Greenville |
| 712-265 | Denison |
| 712-266 | Sioux City |
| 712-267 | Denison |
| 712-268 | Exira |
| 712-269 | Denison |
| 712-270 | Greenville |
| 712-271 | Sergeant Bluff |
| 712-272 | Newell |
| 712-273 | Early |
| 712-274 | Sioux City |
| 712-275 | Schaller |
| 712-276 | Sioux City |
| 712-277 | Sioux City |
| 712-278 | Ireton |
| 712-279 | Sioux City |
| 712-281 | Sioux City |
| 712-282 | Galva |
| 712-283 | Sioux Rapids |
| 712-284 | Storm Lake |
| 712-285 | Sergeant Bluff |
| 712-286 | Rembrandt |
| 712-287 | Iowa |
| 712-288 | Fonda |
| 712-289 | Marathon |
| 712-290 | Rockwell City |
| 712-291 | Storm Lake |
| 712-292 | Carroll |
| 712-293 | Sioux City |
| 712-294 | Sioux City |
| 712-295 | Peterson |
| 712-296 | Linn Grove |
| 712-297 | Rockwell City |
| 712-298 | Sioux City |
| 712-299 | Storm Lake |
| 712-300 | Ida Grove |
| 712-301 | Sioux City |
| 712-302 | Glenwood |
| 712-303 | Clarinda |
| 712-304 | Exira |
| 712-305 | Le Mars |
| 712-307 | Avoca |
| 712-308 | Council Bluffs |
| 712-309 | Council Bluffs |
| 712-310 | Council Bluffs |
| 712-313 | Sidney |
| 712-314 | Council Bluffs |
| 712-318 | Council Bluffs |
| 712-320 | Spirit Lake |
| 712-322 | Council Bluffs |
| 712-323 | Council Bluffs |
| 712-324 | Sheldon |
| 712-325 | Council Bluffs |
| 712-326 | Council Bluffs |
| 712-327 | Red Oak |
| 712-328 | Council Bluffs |
| 712-329 | Council Bluffs |
| 712-330 | Spirit Lake |
| 712-331 | Spirit Lake |
| 712-332 | Arnolds Park |
| 712-333 | Sioux City |
| 712-334 | Sioux Rapids |
| 712-335 | Pocahontas |
| 712-336 | Spirit Lake |
| 712-337 | Arnolds Park |
| 712-338 | Milford |
| 712-339 | Spirit Lake |
| 712-341 | Sheldon |
| 712-342 | Correctionville |
| 712-343 | Avoca |
| 712-344 | Sheldon |
| 712-346 | Greenville |
| 712-347 | Carter Lake |
| 712-348 | Sheldon |
| 712-349 | Harris |
| 712-350 | Hamburg |
| 712-351 | Havelock |
| 712-352 | Council Bluffs |
| 712-353 | Castana |
| 712-355 | Council Bluffs |
| 712-357 | Red Oak |
| 712-358 | Havelock |
| 712-359 | Palmer |
| 712-360 | Orange City |
| 712-362 | Estherville |
| 712-363 | Greenville |
| 712-364 | Ida Grove |
| 712-365 | Battle Creek |
| 712-366 | Council Bluffs |
| 712-367 | Arthur |
| 712-368 | Holstein |
| 712-369 | Ida Grove |
| 712-370 | Red Oak |
| 712-371 | Ida Grove |
| 712-372 | Correctionville |
| 712-373 | Anthon |
| 712-374 | Sidney |
| 712-375 | Pierson |
| 712-376 | Marcus |
| 712-377 | Gravity |
| 712-378 | Kingsley |
| 712-379 | Essex |
| 712-380 | Estherville |
| 712-382 | Hamburg |
| 712-383 | Kingsley |
| 712-384 | Cushing |
| 712-385 | Farragut |
| 712-386 | Essex |
| 712-387 | Sidney |
| 712-388 | Council Bluffs |
| 712-389 | Sioux City |
| 712-390 | Sioux Rapids |
| 712-392 | Estherville |
| 712-393 | Denison |
| 712-395 | Orange City |
| 712-396 | Council Bluffs |
| 712-400 | Rock Rapids |
| 712-404 | Harlan |
| 712-407 | Minden |
| 712-415 | Emmetsburg |
| 712-420 | Onawa |
| 712-421 | Sloan |
| 712-422 | Hawarden |
| 712-423 | Onawa |
| 712-424 | Cylinder |
| 712-425 | Mallard |
| 712-426 | Ayrshire |
| 712-427 | Bedford |
| 712-428 | Sloan |
| 712-429 | Sloan |
| 712-431 | Onawa |
| 712-432 | Lake Park |
| 712-433 | Onawa |
| 712-434 | Aurelia |
| 712-435 | Council Bluffs |
| 712-436 | Cleghorn |
| 712-437 | Larrabee |
| 712-438 | Clarinda |
| 712-439 | Hull |
| 712-441 | Sioux Center |
| 712-442 | Woodbine |
| 712-443 | Meriden |
| 712-444 | Sioux City |
| 712-445 | Quimby |
| 712-446 | Sutherland |
| 712-447 | Washta |
| 712-448 | Paullina |
| 712-449 | Sioux Center |
| 712-450 | Laurens |
| 712-451 | Rock Valley |
| 712-452 | Blencoe |
| 712-453 | Essex |
| 712-454 | Sioux City |
| 712-455 | Whiting |
| 712-456 | Moorhead |
| 712-458 | Whiting |
| 712-459 | Hartley |
| 712-460 | Rock Valley |
| 712-461 | Sibley |
| 712-463 | Sioux Center |
| 712-464 | Lake City |
| 712-465 | Lohrville |
| 712-466 | Lytton |
| 712-467 | Sidney |
| 712-468 | Pomeroy |
| 712-469 | Manson |
| 712-470 | Rock Valley |
| 712-472 | Rock Rapids |
| 712-473 | Alvord |
| 712-475 | George |
| 712-476 | Rock Valley |
| 712-477 | Larchwood |
| 712-478 | Alvord |
| 712-479 | Little Rock |
| 712-480 | Emmetsburg |
| 712-482 | Oakland |
| 712-483 | Minden |
| 712-484 | Carson |
| 712-485 | Neola |
| 712-486 | Macedonia |
| 712-487 | Mc Clelland |
| 712-488 | Portsmouth |
| 712-489 | Panama |
| 712-490 | Sioux City |
| 712-497 | Brayton |
| 712-500 | Le Mars |
| 712-501 | Remsen |
| 712-520 | Glenwood |
| 712-522 | Sioux City |
| 712-523 | Bedford |
| 712-525 | Glenwood |
| 712-526 | Glenwood |
| 712-527 | Glenwood |
| 712-529 | Sidney |
| 712-533 | Merrill |
| 712-534 | Northboro |
| 712-537 | Gravity |
| 712-539 | Le Mars |
| 712-540 | Le Mars |
| 712-541 | Le Mars |
| 712-542 | Clarinda |
| 712-544 | Shelby |
| 712-545 | Crescent |
| 712-546 | Le Mars |
| 712-548 | Le Mars |
| 712-549 | Brayton |
| 712-550 | Hawarden |
| 712-551 | Hawarden |
| 712-552 | Hawarden |
| 712-560 | Sioux City |
| 712-562 | Iowa |
| 712-563 | Audubon |
| 712-566 | Underwood |
| 712-567 | Maurice |
| 712-568 | Akron |
| 712-571 | Earling |
| 712-574 | Sioux City |
| 712-577 | Sioux City |
| 712-578 | Hull |
| 712-579 | Earling |
| 712-580 | Greenville |
| 712-581 | Shenandoah |
| 712-582 | Coin |
| 712-583 | Coin |
| 712-584 | Spencer |
| 712-585 | New Market |
| 712-586 | Iowa |
| 712-587 | Sioux City |
| 712-588 | Brayton |
| 712-589 | Braddyville |
| 712-590 | Massena |
| 712-592 | Woodbine |
| 712-600 | Missouri Valley |
| 712-607 | Walnut |
| 712-621 | Red Oak |
| 712-622 | Pacific Junction |
| 712-623 | Red Oak |
| 712-624 | Malvern |
| 712-625 | Tabor |
| 712-626 | Primghar |
| 712-627 | Earling |
| 712-628 | Thurman |
| 712-629 | Tabor |
| 712-630 | Sanborn |
| 712-631 | Sheldon |
| 712-635 | Sioux City |
| 712-636 | Nemaha |
| 712-642 | Missouri Valley |
| 712-643 | Dunlap |
| 712-644 | Logan |
| 712-645 | Missouri Valley |
| 712-646 | Missouri Valley |
| 712-647 | Woodbine |
| 712-648 | Missouri Valley |
| 712-649 | Little Sioux |
| 712-650 | Lake View |
| 712-651 | Bayard |
| 712-652 | Scranton |
| 712-653 | Manning |
| 712-654 | Manilla |
| 712-655 | Manning |
| 712-656 | Lohrville |
| 712-657 | Lake View |
| 712-658 | Carroll |
| 712-659 | Glidden |
| 712-660 | Early |
| 712-661 | Early |
| 712-662 | Sac City |
| 712-663 | Westside |
| 712-664 | Wall Lake |
| 712-665 | Lake View |
| 712-667 | Glidden |
| 712-668 | Odebolt |
| 712-669 | Templeton |
| 712-673 | Breda |
| 712-674 | Dow City |
| 712-675 | Kiron |
| 712-676 | Schleswig |
| 712-677 | Vail |
| 712-678 | Charter Oak |
| 712-679 | Ute |
| 712-682 | Iowa |
| 712-683 | Dedham |
| 712-684 | Coon Rapids |
| 712-688 | Auburn |
| 712-689 | Arcadia |
| 712-693 | Sac City |
| 712-695 | Clarinda |
| 712-707 | Orange City |
| 712-720 | Sibley |
| 712-722 | Sioux Center |
| 712-723 | Archer |
| 712-724 | Ashton |
| 712-725 | Boyden |
| 712-726 | Doon |
| 712-727 | Granville |
| 712-728 | Hartley |
| 712-729 | Sanborn |
| 712-730 | Storm Lake |
| 712-732 | Storm Lake |
| 712-733 | Harlan |
| 712-735 | Iowa |
| 712-736 | Melvin |
| 712-737 | Orange City |
| 712-738 | Sheldon |
| 712-739 | Doon |
| 712-740 | Sioux |
| 712-741 | Hancock |
| 712-743 | Portsmouth |
| 712-744 | Harlan |
| 712-745 | Iowa |
| 712-746 | Iowa |
| 712-747 | Earling |
| 712-748 | Defiance |
| 712-749 | Storm Lake |
| 712-750 | Sibley |
| 712-752 | Hospers |
| 712-753 | Inwood |
| 712-754 | Sibley |
| 712-755 | Harlan |
| 712-756 | Alton |
| 712-757 | Primghar |
| 712-758 | Ocheyedan |
| 712-759 | Spirit Lake |
| 712-762 | Anita |
| 712-763 | Elliott |
| 712-764 | Elk Horn |
| 712-766 | Kirkman |
| 712-767 | Elliott |
| 712-769 | Lewis |
| 712-770 | Carroll |
| 712-773 | Kimballton |
| 712-774 | Cumberland |
| 712-775 | Carroll |
| 712-776 | Havelock |
| 712-777 | Iowa |
| 712-778 | Lewis |
| 712-779 | Massena |
| 712-781 | Marne |
| 712-782 | Irwin |
| 712-783 | Wiota |
| 712-784 | Walnut |
| 712-785 | Nodaway |
| 712-786 | Remsen |
| 712-789 | Lewis |
| 712-790 | Carroll |
| 712-792 | Carroll |
| 712-794 | Carroll |
| 712-797 | Wall Lake |
| 712-799 | Iowa |
| 712-800 | Glenwood |
| 712-822 | Glidden |
| 712-823 | Sergeant Bluff |
| 712-824 | Emerson |
| 712-825 | Henderson |
| 712-826 | Villisca |
| 712-827 | Oto |
| 712-828 | Council Bluffs |
| 712-829 | Stanton |
| 712-830 | Glidden |
| 712-831 | Lake Park |
| 712-832 | Lake Park |
| 712-834 | Everly |
| 712-835 | Webb |
| 712-836 | Dickens |
| 712-837 | Ruthven |
| 712-838 | Webb |
| 712-840 | Mapleton |
| 712-841 | Laurens |
| 712-843 | Albert City |
| 712-845 | Laurens |
| 712-847 | Council Bluffs |
| 712-848 | Rolfe |
| 712-850 | Clarinda |
| 712-851 | Iowa |
| 712-852 | Emmetsburg |
| 712-853 | Terril |
| 712-854 | Denison |
| 712-855 | Curlew |
| 712-857 | Havelock |
| 712-858 | Estherville |
| 712-859 | Graettinger |
| 712-864 | Armstrong |
| 712-865 | Dolliver |
| 712-866 | Ringsted |
| 712-867 | Wallingford |
| 712-868 | Armstrong |
| 712-869 | Sheldon |
| 712-873 | Moville |
| 712-874 | Hornick |
| 712-876 | Hornick |
| 712-880 | Mapleton |
| 712-881 | Mapleton |
| 712-882 | Mapleton |
| 712-883 | Danbury |
| 712-884 | Soldier |
| 712-885 | Ute |
| 712-886 | Moorhead |
| 712-887 | Rockwell City |
| 712-889 | Smithland |
| 712-890 | Council Bluffs |
| 712-893 | Danbury |
| 712-898 | Sioux City |
| 712-899 | Sioux City |
| 712-904 | Akron |
| 712-922 | Emmetsburg |
| 712-923 | Sergeant Bluff |
| 712-924 | Sergeant Bluff |
| 712-928 | Hartley |
| 712-930 | Sanborn |
| 712-933 | Royal |
| 712-934 | Sergeant Bluff |
| 712-938 | Merrill |
| 712-939 | Villisca |
| 712-941 | Sergeant Bluff |
| 712-942 | Sergeant Bluff |
| 712-943 | Sergeant Bluff |
| 712-944 | Lawton |
| 712-945 | Salix |
| 712-946 | Salix |
| 712-947 | Hinton |
| 712-948 | Bronson |
| 712-949 | Paullina |
| 712-957 | Primghar |
| 712-963 | Iowa |
| 712-964 | Iowa |
| 712-973 | Iowa |
| 712-975 | Schaller |
| 712-982 | Iowa |
| 712-986 | Iowa |
| 712-992 | Logan |
| 712-999 | Coon Rapids |