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Area code 401
Area code 401 is the sole telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Rhode Island. 401 is one of the original North American area codes, which were established in 1947.
Area code 401 is not projected to exhaust its supply of vacant central office codes until 2055.[1]
- ^ "2024-1 NRUF and NPA Exhaust Analysis" (PDF). nationalnanpa.com. April 2024. Retrieved July 6, 2024.
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