Iowa phone numbers and area codes
Iowa has 5 area codes and 2,748 assigned prefixes.
Look at a prefix's carrier mix below, or look up a full number on the home page.
- Mobile carrier 26%
- Local phone company 34%
- Internet / business phone carrier 22%
- Phone company 18%
Area codes in Iowa
| Code | Area | Prefixes here |
|---|---|---|
| 319 | Iowa (Cedar Rapids, Waterloo, Burlington, Iowa City; parts of eastern Iowa) | 565 |
| 515 | Iowa (Des Moines, Ames, Fort Dodge, Jefferson, Indianola, and most of north-central Iowa) | 578 |
| 563 | Iowa (Davenport, Dubuque, Clinton, Bettendorf, and most of eastern and northeastern Iowa) | 388 |
| 641 | Iowa (Mason City, Oskaloosa, Creston, Pella, Ottumwa, Britt, Clear Lake, Fairfield, and parts of central Iowa) | 584 |
| 712 | Iowa (Sioux City, Council Bluffs, Denison, and most of western Iowa) | 633 |
Biggest local calling areas
Numbers are assigned to rate centers. These have the most prefixes in Iowa (the number is how many).
Des Moines257Cedar Rapids110Davenport79Sioux City73Iowa City50Waterloo47Ames39Dubuque36Council Bluffs29Mason City20Burlington19Muscatine19Clinton18Winterset17New Haven17Marshalltown16Ottumwa15Fort Dodge14Cedar Falls13Boone13Sergeant Bluff13DeWitt12Pella12Oskaloosa12New Hampton12Fort Madison11Pleasantville11Decorah11Charles City11Spencer11Mtpleasant10Washington10Newton10Le Mars10Anamosa9Keokuk9Indianola9Fairfield9Grinnell9Carroll9Algona8Knoxville8Iowa Falls8Storm Lake8Harlan8Oelwein7Webster City7Adel7Osceola7Atlantic7Denison7Red Oak7Vinton6Independence6Keosauqua6Waverly6North Liberty6Humboldt6Manchester6Creston6Centerville6Clear Lake6Onawa6Cherokee6Emmetsburg6Spirit Lake6Columbus Junction5Grundy Center5Brighton5Parkersburg5Eagle Grove5Clarion5Cresco5Waukon5Tipton5West Union5Chariton5Forestcity5Toledo5Lenox5
Carriers in Iowa
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| CenturyLink / Lumen | Local phone company | 408 | 15% |
| Verizon Wireless | Mobile carrier | 225 | 8% |
| UScellular | Mobile carrier | 175 | 6% |
| Onvoy | Internet / business phone carrier | 166 | 6% |
| T-Mobile (including Sprint) | Mobile carrier | 156 | 6% |
| Windstream Iowa Communications, Inc. - North | Local phone company | 147 | 5% |
| Windstream Iowa Communications | Local phone company | 141 | 5% |
| AT&T Mobility | Mobile carrier | 126 | 5% |
| Windstream Iowa Communications, Inc. - Systems | Local phone company | 71 | 3% |
| TON80 Communications | Internet / business phone carrier | 57 | 2% |
| Mcc Telephony Of Iowa | Internet / business phone carrier | 57 | 2% |
| Mcc Telephony | Internet / business phone carrier | 49 | 2% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.