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List of North American Numbering Plan area codes - Wikipedia
Lists of North American area codes - Wikipedia
List of North American Numbering Plan area codes
North American Numbering Plan - Wikipedia
North American Numbering Plan - Simple English Wikipedia, …
NANPA : Number Resources - NPA (Area) Codes
Original North American area codes - Wikipedia
About: List of North American Numbering Plan area codes
North American Numbering Plan expansion - Wikipedia
List of New York area codes - Wikipedia
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