641 Area Code

Primary cities: Mason City, New Haven, Marshalltown, Ottumwa, Pella ... all cities

Cities: Ackley, Adair, Afton, Agency, Albia, Albion, Alexander, Allerton, Alta Vista, Amund, Aredale, Arispe, Attica, Bagley, Bailey, Barnes City, Batavia, Baxter, Belmond, Benton, Bladensburg, Blakesburg, Blockton, Bloomfield, Bridgewater, Bristow, Britt, Brooklyn, Buffalo Center, Bussey, Casey, Centerville, Chariton, Charles City, Chelsea, Chillicothe, Cincinnati, Clear Lake, Clearfield, Clemons, Collins, Colo, Conrad, Corning, Corydon, Coulter, Creston, Crystal Lake, Davis City, Deep River, Delta, Derby, Diagonal, Douds, Dougherty, Drakesville, Dumont, Eddyville, Eldon, Eldora, Elma, Fairfield, Farson, Ferguson, Fertile, Floris, Floyd, Fontanelle, Forest City, Fremont, Garden Grove, Garner, Garwin, Geneva, Gilman, Gladbrook, Goodell, Grafton, Grand River, Green Mountain, Greene, Greenfield, Grinnell, Guthrie Center, Hampton, Hanlontown, Harper, Haverhill, Hedrick, Hubbard, Humeston, Iowa Falls, Jamaica, Joice, Kanawha, Kellerton, Kellogg, Kensett, Kent, Keota, Killduff, Klemme, Knoxville, Lacona, Lake Mills, Lamoni, Latimer, Laurel, Le Grand, Leighton, Leland, Lenox, Leon, Liberty Center, Libertyville, Linden, Lineville, Liscomb, Little Cedar, Lorimor, Lovilia, Lucas, Lynnville, Macksburg, Malcom, Manly, Marble Rock, Mark, Marshalltown, Martensdale, Martinsburg, Mason City, Melbourne, Melcher, Melrose, Menlo, Meservey, Miller, Millerton, Milo, Milton, Mingo, Mona, Monroe, Montezuma, Montour, Moravia, Moulton, Mount Ayr, Murray, Mystic, Nashua, Nevinville, New Hampton, New Haven, New Providence, New Sharon, New Virginia, Newton, Nora Springs, Northwood, Ollie, Orient, Osage, Osceola, Oskaloosa, Otley, Ottumwa, Panora, Pella, Peoria, Peru, Plano, Plymouth, Prescott, Promise City, Pulaski, Rake, Reasnor, Redding, Rhodes, Riceville, Rockford, Rockwell, Rose Hill, Rowan, Rudd, Russell, Scarville, Searsboro, Seymour, Shannon City, Sharpsburg, Sheffield, Sigourney, South Adams, South Emmons, St. Ansgar, St. Charles, St. Marys, Stacyville, State Center, Steamboat Rock, Stevens, Sully, Swaledale, Thayer, Thompson, Thornton, Tingley, Toledo, Tracy, Truro, Union, Unionville, Ventura, Weldon, Wellsburg, What Cheer, Williamson, Woden, Yale, Zearing