Wisconsin Area Codes

Area codes: 8
ZIP codes: 896
Cities & towns: 753
Counties: 72

Every area code in Wisconsin

All Wisconsin area codes, what each primarily serves, and which share ground with another.
Area code	Primarily serves	Shares ground with	In service
262	Milwaukee	no overlay	1999
274	Milwaukee	920	2023
353	Madison	608	2023
414	Milwaukee	no overlay	1947
534	Green Bay	715	2010
608	Madison	353	1955
715	Green Bay	534	1947
920	Milwaukee	274	1997

A code in the “shares ground” column is an overlay: it covers the same territory rather than a different part of Wisconsin, which is why local calls there are dialled as ten digits.

Which codes share the same ground

Wisconsin has 3 groups of codes that overlay one another: the codes inside a group cover the same territory rather than different parts of the state, so local calls there are dialled as ten digits.

262 and 414 have no overlay: each is the only code serving its own territory.

Where Wisconsin's communities sit

Each point is a Wisconsin community, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Largest Wisconsin cities and their codes

largest 25

Scope every area code assigned to Wisconsin. Source LocalCallingGuide NPA list (2026-07 NPA list) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. Overlay relationships come from the numbering-plan authority; the city match is computed.