Area Code 353 — Madison, Wisconsin

NANP area code

353

UTC−6, UTC−5 during daylight saving

State
Wisconsin
Primary city
Madison
Time zone
Central
In service
2023
Overlay
608

The code reaches 187 communities and 20 counties across Wisconsin.

Was this call legitimate?

The area code itself carries no risk signal. 353 is assigned to Madison, Wisconsin, so a call from it is consistent with a real caller in that area — but the digits alone prove nothing, because they can be forged.

Caller ID is set by whoever places the call, not verified by the network. That is why neighbour spoofing works: an operation anywhere in the world can display a number that matches the area code — and often the first three digits after it — of the person being called, so the call looks local. Every community in the 353 territory is a plausible-looking origin for a forged 353 number, which is why one can be made to look like a neighbour to so many people. The same applies to its overlay code 608, which serves the same ground.

If you did not recognise the call: let it go to voicemail — a legitimate caller with real business will leave one. Do not return the call using the number shown; look the organisation up independently and call the number you found. Never confirm personal details, card numbers, or one-time codes to someone who called you, however plausible the number looked.

Codes.zone publishes no complaint counts, risk scores, or caller identities. We hold no data on individual numbers and will not estimate what we cannot source.

Local time and when to call back

Time there now

Central · UTC−6, UTC−5 during daylight saving

Reasonable callback window

8:00 AM – 9:00 PM

local time in Central

Federal rules bar telemarketing calls to a residence outside 8:00 AM–9:00 PM in the called party's own time zone. It is a sensible bound for a personal callback too — and a caller who rang you well outside it was not observing it.

Overlay codes and ten-digit dialling

353 does not have its territory to itself. 608 covers the same ground, serving Madison and the rest of the 353 territory. An overlay is what a regulator adds when a region runs out of assignable numbers: rather than splitting the area and forcing half the residents to change their number, a second code is laid over the top and new numbers are issued from it.

The practical consequence: two neighbours on the same street can hold numbers in different area codes, so the code tells you nothing about which part of town a caller is in — and local calls must be dialled as all ten digits, because seven is no longer unambiguous.

Cities served

largest 20 by ZIP count
Communities served by area code 353, ranked by how many ZIP codes each holds.
CityZIP codesCounty
Madison35Dane County
Janesville4Rock County
La Crosse3La Crosse County
Beloit2Rock County
Dodgeville2Iowa County
Reedsburg2Sauk County
Sun Prairie2Dane County
Adams1Adams County
Afton1Rock County
Albany1Green County
Alma1Buffalo County
Arcadia1Trempealeau County
Arena1Iowa County
Argyle1Lafayette County
Arkdale1Adams County
Arlington1Columbia County
Avalon1Rock County
Avoca1Iowa County
Bagley1Grant County
Bangor1La Crosse County

167 further communities not listed. All Wisconsin area codes →

Each point is a community served by 353, 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

Scope every community matched to 353. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot), GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . Coordinates are place reference points, not boundaries.

Counties

Prefixes inside 353

We do not publish the NXX prefixes inside 353. The assignment of prefixes to rate centres comes from LERG routing data, which is proprietary, and we will not estimate it from postal data — ZIP codes and telephone prefixes do not map onto each other. Awaiting a clean-rights NPA-NXX source.

Why this code exists

353 is the newer code here, added in 2023 over 608 (1955). The older code had run out of exchanges to assign, and an overlay avoids the alternative — splitting the region and forcing half its residents to renumber. New lines have been issued from 353 since.