920 Area Code: Green Bay, Wisconsin

Northeastern Wisconsin is served by the 920 area code, with Green Bay as the primary city. Green Bay sits at the head of the bay that gives the city its name, on a stretch of Lake Michigan's western shore that has long anchored a substantial paper-and-pulp industry — the surrounding region remains one of the larger paper-manufacturing concentrations in the country — alongside the famously long-running Green Bay Packers franchise. The 920 footprint extends through Appleton, Oshkosh, Sheboygan, Fond du Lac, and the surrounding cluster of cities along the Fox River Valley and the Lake Michigan shore.

In records the directory has compiled for 920 numbers, other Wisconsin cities — Eau Claire, Kenosha, Madison, and Milwaukee — recur frequently. None of those are inside the 920 footprint. The pattern reflects standard public-record dynamics, with phone numbers porting across Wisconsin and addresses linked across multiple cities. The directory currently documents 558 distinct prefixes within 920 in detail, a working subset of the prefix population the code carries.

Green Bay's home values come in below the US median, with median household income running below the national figure. The city's median age sits a few years under the US reading, and population places Green Bay among the larger cities in northeastern Wisconsin — substantial enough to anchor a regional economy organized around the paper industry, healthcare, and the surrounding cluster of mid-sized cities along the Fox River Valley.