Area codes 920 and 274

Area codes in WisconsinArea codes in the United States

Area codes 920 and 274 are telephone area codes in the North American Numbering Plan (NANP) for a large area of eastern Wisconsin. Area code 920 was created on July 26, 1997, in a split of area code 414, one of the original North American area codes of 1947. 274 was added to the same numbering plan area (NPA) on May 5, 2023 to create an area code overlay. The 920/274 area code covers most of Northeast Wisconsin including Green Bay and the Fox Cities as well as the far northern and eastern exurban areas of the Madison MSA and far northern and western portions of the Milwaukee CSA

Excerpt from the Wikipedia article Area codes 920 and 274 (License: CC BY-SA 3.0, Authors, Images).