728 Area Code
Eastern Wisconsin (overlay), Wisconsin
Area code 728 is located in Eastern Wisconsin (overlay), Wisconsin. It covers Green Bay, Appleton, and surrounding areas in the Central time zone (UTC-6). Administered by NANPA.
Where is area code 728?
Area code 728 is located in Eastern Wisconsin (overlay), Wisconsin. It covers Green Bay, Appleton, and surrounding areas in the Central time zone (UTC-6).
Cities Covered by Area Code 728
Area code 728 primarily serves the Eastern Wisconsin (overlay) area of Wisconsin. The exact coverage includes Green Bay, Appleton, and Oshkosh, along with surrounding communities and suburbs.
Time Zone
Central Time — UTC-6
Area code 728 operates in the Central Time Zone. When calling 728 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 728
Area code 728 was introduced in 2021 as a geographic area code serving Eastern Wisconsin (overlay), Wisconsin. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.