Area Codes by State & Metro

Yes. Every state has at least one area code, and area codes never cross state lines. 11 states still operate with a single code for the whole state: Alaska, Delaware, Hawaii, Maine, Montana, New Hampshire, North Dakota, Rhode Island, South Dakota, Vermont, Wyoming.

The five states with the most active area codes are California (41), Texas (29), New York (23), Florida (23), Illinois (17). These rankings shift as new overlay codes enter service in growing regions.

No. Geographic area codes never cross state lines, which is why an area code reliably identifies a state. The reverse is not true within a state: a single code can cover multiple cities, and large metros are covered by several overlapping codes.

Yes. Puerto Rico uses 787 and 939, the U.S. Virgin Islands use 340, Guam uses 671, the Northern Mariana Islands use 670, and American Samoa uses 684. All are part of the North American Numbering Plan, so calling them from a state works like a domestic call.

The North American Numbering Plan Administrator (NANPA) assigns codes based on demand for phone numbers, not geography or population directly. When a region nears exhaustion, state regulators and NANPA agree on relief, almost always an overlay code covering the same territory as the existing code.

You do not need to live somewhere to hold a number there. Number providers sell local numbers in any area code, which businesses use to establish a local presence in the markets they serve. Pick the state or metro above and browse the available numbers for its codes.