Area Code 353 – Wisconsin
The phone area code for Wisconsin is 353 (international format +1353). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 353
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Wisconsin
Geographic Coverage and Jurisdiction
Area code 353 is a geographic North American Numbering Plan (NANP) code assigned to the state of Wisconsin, United States. It serves a substantial portion of the state's eastern and central regions, encompassing the Fox Cities metropolitan area and surrounding communities. Major cities within the 353 numbering plan area include Appleton, Oshkosh, Green Bay, and Fond du Lac, as well as numerous smaller municipalities in Outagamie, Winnebago, Brown, and Fond du Lac counties. The code is administered under the jurisdiction of the Wisconsin Public Service Commission and follows the regulatory framework of the Federal Communications Commission (FCC) for numbering resource allocation.
Dialing Formats and Caller Instructions
For local calls within the 353 area code, callers must use the 10-digit dialing format: 353-XXX-XXXX. This includes calls between different exchanges within the same area code. For calls originating from other area codes within the NANP (e.g., from New York or California), the international format is +1 353 XXX XXXX when dialed from outside the United States. Domestic callers within the U.S. and Canada should dial 1 353 XXX XXXX. When calling from a foreign country, the international access prefix (e.g., 011 from the U.S., 00 from most European countries) is used, followed by the country code 1 and the area code.
Overlay and Numbering Exhaustion Considerations
Area code 353 is an overlay code for the pre-existing 920 area code, which was introduced to address numbering exhaustion in the region. As a result, the same geographic area is served by both 920 and 353. This overlay mandates 10-digit dialing for all local calls, even between numbers within the same area code. New telephone numbers in the region may be assigned either 920 or 353 prefixes, depending on availability. This structure ensures a continuous supply of numbers without requiring customers to change their existing numbers.
Service and Routing Characteristics
Area code 353 is a geographic code, meaning it is tied to a specific physical location. However, with the advent of number portability, customers may retain their 353 numbers even if they relocate within the same rate center or, in some cases, across the country, subject to regulatory rules. The code supports all standard telecommunications services, including PSTN landlines, VoIP, and mobile services. For international callers, the +1 country code is used, and the 353 area code is treated as a standard NANP destination. Callers should be aware that tariffs for international calls to the U.S. vary by carrier, and VoIP services may have different rates.