Wisconsin Area Code 414 to 920 Changes

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          Effective 7-26-1997 most of the previous 414 Area Code telephone numbers outside of the Milwaukee area changed to the new 920 Area Code. Both codes will work until 10-25-1997, when 414 will be valid only for Milwaukee area calls.

          We wrote to Ameritech to see if they were going to put detailed 414 to 920 conversion information on their Web site. We received the following response on 8-08-1997 from Amy Beck, Manager - Corporate Communications: "...we are currently in the process of revamping the entire site, including updating prefix listings and adding area code maps. In the meantime, I am forwarding 414 and 920 prefix listings as of July 24. Also attached are listings of the communities in each of the area codes."

          There are prefix numbers that already exist in both the 920 and 414 Area Codes. The complete list can be found on a separate prefix lookup page.  

          Below is a list of all Wisconsin cities that were in the 414 Area Code prior to 7-26-1997. We preceded the name of each city in Ameritech's two lists of communities with its new, or unchanged, Area Code and merged them into one list, sorted by city. Scroll down, or use your browser's find function to search for a particular city.

920 Abrams
920 Algoma
414 Allenton
920 Allouez
920 Appleton 
920 Ashwaubenon 
920 Baileys Harbor 
414 Bayside
920 Beaver Dam
414 Belgium
414 Bergen
920 Berlin
414 Big Bend
920 Black Creek 
414 Bohners Lake
920 Brandon
920 Brillion 
414 Bristol
414 Brookfield
414 Brown Deer
920 Brussels 
414 Burlington
920 Burnett
414 Butler
414 Caledonia
920 Cambria
920 Campbellsport
920 Cascade
920 Casco 
920 Cedar Grove 
414 Cedarburg
920 Chilton
920 Cleveland
920 Clyman
920 Coleman
920 Collins
920 Columbus 
414 Cudahy
414 Darien
920 De Pere
414 Delafield
414 Delavan
920 Denmark
414 Dousman
414 Eagle 
414 East Troy
920 Eden
920 Egg Harbor
920 Elkhart Lake
414 Elkhorn
414 Elm Grove
920 Fall River
920 Fond du Lac 
920 Forestville 
920 Fort Atkinson
920 Fox Lake 
414 Fox Point
414 Franklin 
920 Fremont
414 Genesee
414 Genoa City
414 Germantown
920 Gillett
414 Glendale 
414 Grafton
920 Green Bay
920 Green Lake
920 Greenbush
414 Greendale
414 Greenfield
920 Greenville
414 Hales Corners
414 Hartford 
414 Hartland 
920 Hilbert
920 Horicon
920 Howard
920 Howards Grove
414 Hubertus 
920 Hustisford
414 Jackson
920 Jacksonport 
920 Jefferson
920 Johnsburg
920 Johnson Creek
920 Juneau
920 Kaukauna 
414 Kenosha
414 Kewaskum 
920 Kewaunee 
920 Kiel
920 Kingston 
920 Krakow
414 Lake Geneva 
920 Lake Mills
920 Larsen
414 Lauderdale
920 Lebanon
920 Lena
920 Little Chute
920 Little Sturgeon
920 Lomira
920 Luxemburg
920 Manawa
920 Manitowoc
920 Mapleton 
920 Markesan 
920 Mayville 
920 Menasha
414 Menomonee Falls
414 Mequon
920 Mill Center 
414 Milwaukee
920 Mishicot 
920 Mount Calvary
414 Mukwonago
414 Muskego
920 Neenah
920 Neosho
920 Neshkoro 
414 New Berlin
920 New Franken 
920 New Holstein
920 New London
414 Newburg
920 Newton
920 Newtonburg
920 Nichols
414 North Prairie
414 Oak Creek
920 Oakfield 
414 Oconomowoc
920 Oconto
920 Oconto Falls
920 Ogdensburg
920 Omro
920 Oneida
920 Oostburg
920 Oshkosh 
414 Palmyra
414 Pewaukee 
920 Pickett 
414 Pleasant Prairie
920 Plymouth
414 Port Washington
920 Poy Sippi
920 Princeton
920 Pulaski 
414 Racine
920 Randolph
920 Random Lake
920 Readfield
920 Redgranite 
920 Reedsville 
920 Reeseville 
920 Rio
920 Ripon
414 River Hills 
920 Rosendale
414 Salem 
414 Saukville
920 Seymour 
414 Sharon
920 Sheboygan
920 Sheboygan Falls
920 Sherwood
920 Shiocton
414 Shorewood
414 Silver Lake
920 Sister Bay 
414 Slinger 
414 Somers
414 South Milwaukee
920 St. Cloud
414 St. Francis
920 St. Nazianz
920 Stockbridge
920 Sturgeon Bay
414 Sturtevant 
414 Sullivan
920 Suring
414 Sussex
920 Theresa 
414 Thiensville
920 Tisch Mills
414 Trevor
414 Twin Lakes 
920 Two Rivers 
414 Union Grove
920 Valders 
920 Van Dyne
414 Walworth
920 Washington Island
414 Waterford
920 Waterloo
920 Watertown
414 Waubeka 
414 Waukesha
920 Waupun
920 Wautoma 
414 Wauwatosa
920 Wayside 
414 West Allis 
414 West Bend
414 West Milwaukee
920 Weyauwega
414 Wheatland
414 Whitefish Bay 
920 Whitelaw
414 Whitewater 
920 Wild Rose
414 Williams Bay
414 Wind Lake
920 Winneconne 
920 Wrightstown

URL: http://www.folklib.net/henkle/home_414_to_920.shtml
Please send additions and/or corrections to Doug Henkle: [email protected]
P.O. Box 331, Ripon, WI 54971-0331

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