North American telephone area code 920 covers much of eastern Wisconsin. It was created on July 26, 1997, in a split from area code 414. 414 formerly covered the entire eastern third of the state. 920 will eventually be overlaid with area code 274, but 920 is not predicted to be exhausted until 2028.
A mnemonic device many used for the new area code was to remember Green Bay Packer Reggie White's jersey number, 92, and add a zero.
Counties served by this area code:
- Brown, Calumet, Columbia, Dodge, Door, Fond du Lac, Green Lake, Jefferson, Kewaunee, Manitowoc, Marinette, Marquette, Oconto, Outagamie, Shawano, Sheboygan, Waushara, and Winnebago
Towns and cities served by this area code:
- Abrams, Adell, Algoma, Appleton, Ashippun, Baileys Harbor, Beaver Dam, Berlin, Black Creek, Brandon, Brillion, Brownsville, Brussels, Burnett, Butte des Morts, Cambria, Campbellsport, Cascade, Casco, Cedar Grove, Chilton, Cleveland, Clyman, Coleman, Collins, Columbus, Combined Locks, Dale, Dalton, Darboy, De Pere, Denmark, Doylestown, Eden, Egg Harbor, Eldorado, Elkhart Lake, Ellison Bay, Ephraim, Erin, Eureka, Fairwater, Fall River, Fish Creek, Fond du Lac, Forest Junction, Forestville, Fort Atkinson, Fox Lake, Francis Creek, Freedom, Fremont, Friesland, Gillett, Glenbeulah, Green Bay, Green Lake, Greenbush, Greenleaf, Greenville, Hilbert, Hingham, Horicon, Hortonville, Hustisford, Iron Ridge, Ixonia, Jefferson, Johnson Creek, Juneau, Kaukauna, Kellnersville, Kewaunee, Kiel, Kimberly, Kingston, Kohler, Krakow, Lake Mills, Larsen, Lebanon, Lena, Little Chute, Little Suamico, Lomira, Lowell, Luxemburg, Malone, Manawa, Manitowoc, Maplewood, Maribel, Markesan, Marquette, Mayville, Menasha, Mishicot, Mount Calvary, Neenah, Neosho, Neshkoro, New Franken, New Holstein, New London, Newton, Nichols, Oakfield, Oconto, Oconto Falls, Ogdensburg, Omro, Oneida, Oostburg, Oshkosh, Pickett, Pine River, Plymouth, Potter, Pound, Poy Sippi, Princeton, Pulaski, Randolph, Random Lake, Readfield, Redgranite, Reedsville, Reeseville, Rio, Ripon, Rosendale, Rubicon, St. Cloud, St. Nazianz, Saxeville, Seymour, Sheboygan, Sheboygan Falls, Sherwood, Shiocton, Sister Bay, Sobieski, Stockbridge, Sturgeon Bay, Suamico, Suring, Theresa, Tisch Mills, Two Rivers, Valders, Van Dyne, Waldo, Washington Island, Waterloo, Watertown, Waukau, Waupun, Wautoma, Weyauwega, Whitelaw, Wild Rose, Winnebago, Winneconne, Woodland, and Wrightstown
Area code 920 has telephone numbers assigned for the central office code 988 (e.g., 988-0199). As of October 17, 2020, 988 has been assigned by law as a three-digit code for the National Suicide Prevention Lifeline. To avoid conflicts in switching systems, the Federal Communications Commission has ordered telecommunication carriers of 83 area codes, including 920, to transition to ten-digit dialing in the respective numbering plan area, even though it is not part of an overlay plan. Alternatively, the 988 prefix may be retired in the numbering plan. Per the timeline set by the North American Numbering Plan Administrator, permissive dialing begins on April 24, 2021 and ten-digit dialing is required starting on October 24, 2021.