Green Bay, WI Area Codes

Area codes serving Green Bay

Green Bay sits in Wisconsin, part of the Midwest region and the Central Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 274, 920.

The original code is 920 (in service since 1997). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.

Code	Area served	In service
274	Northeastern and east-central Wisconsin, including Green Bay, Appleton, Oshkosh and Sheboygan	May 5, 2023
920	Northeastern and east-central Wisconsin, including Green Bay, Appleton, Oshkosh and Sheboygan	July 26, 1997

Nearby cities sharing these area codes

• Appleton
• Oshkosh
• Sheboygan
• Fond du Lac
• De Pere
• Manitowoc
• Neenah
• Kaukauna
• Menasha
• Watertown
• Beaver Dam
• Two Rivers
• Sturgeon Bay

How to pick an area code for a new number

When you activate a new line in Green Bay, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 920), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.

Dialing in Green Bay

Because Green Bay is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in Wisconsin, visit the Wisconsin area codes page.