The state of Wisconsin is covered by the following area codes:
Area code 262, which covers the southeast part of the state, excluding Milwaukee but including Racine and Waukesha
Area code 274 will overlay area code 920 starting in 2012.
Area code 414, which covers Milwaukee County.
Area code 608, which covers southwest Wisconsin including Madison
Area codes 715 and 534, which cover northern Wisconsin, including Eau Claire and Wausau
Area code 920, which covers eastern Wisconsin including Green Bay