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Area codes 608 and 353 are telephone area codes in the North American Numbering Plan for much of southwestern Wisconsin, including the state capital city Madison. Area code 608 was assigned in 1955 to a numbering plan area created from areas with area code 414 and area code 715,[1] and was the third area code created in Wisconsin.[2] Rapid growth of the area, specifically in Dane County, brought the area code close to exhaustion of central office prefixes, with NANPA projections in 2022 projecting the need for relief by late 2023.[3] In September 2022, the Wisconsin Public Service Commission and North American Numbering Plan Administrator (NANPA) announced an overlay complex for the numbering plan area with new area code 353, with an in-service date of September 15, 2023.[4][5] New central office code orders were accepted starting on July 11, 2023, but activatlon is contingent on complete exhaustion of central office codes for 608.
- ^ Notes on Distance Dialing. American Telephone and Telegraph Company. 1956.
- ^ "Add Area Code to State Calls". Racine Journal Times. July 23, 1960. p. 3. Retrieved July 28, 2023 – via Newspapers.com.
- ^ "2022-1_NPA_Exhaust_Projections.pdf" (PDF). March 1, 2022.
- ^ "Planning Letter 605: NPA 353 and 608 All-Services Overlay (Wisconsin)" (PDF). NANPA. 2022-11-09. Retrieved 2023-07-29.
- ^ Reigstad, Logan (2022-09-22). "New 353 area code to launch in south-central, southwestern Wisconsin in late 2023". Channel3000.com. Retrieved 2023-02-23.