353 area code — Madison, WI geographic
353 is the area code for Madison, Wisconsin, in service since September 15, 2023, Central time. The same territory is also served by its overlay code (353/608 complex). Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.
The code currently holds 12 working prefixes, held by 3 different carriers. Of these, 12 are pooled prefixes shared by multiple carriers. Numbers are anchored to 11 rate centers — billing localities that fix where each prefix belongs.
Practical takeaway: the 353 label narrows geography to Wisconsin, the prefix narrows it to a locality, and neither authenticates a caller. Verification means calling back through a number you found yourself.
Local calls inside 353 are dialed 10D; 1+10 digit dialing permissible at service provider discretion..
The current NANPA exhaust forecast for the 353/608 complex is 1Q 2065.
The code was carved out of 608 (2023).
Largest localities in 353
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Madison | 2 | 608 |
| Highland | 1 | 608 |
| Lone Rock | 1 | 608 |
| Montello | 1 | 608 |
| Belleville | 1 | 608 |
| Bloom City | 1 | 608 |
| De Forest | 1 | 608 |
| Centerville | 1 | 608 |
| Mazomanie | 1 | 608 |
| Albany | 1 | 608 |
FAQ
Why do 608 and 353 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 353/608 complex shares one service area, and local calls are dialed with 10 digits.
Will 353 run out of numbers?
NANPA's current forecast projects exhaust in 1Q 2065 — decades of capacity remain.
Why am I getting spam calls from 353 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 353 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 353 number from?
353 is assigned to Madison and surrounding areas of Wisconsin in the Central time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 353 a toll-free number?
No. 353 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.