710 Area Code

710 is not tied to any state or city — it is reserved for the US federal government. NANPA lists it as in service since 1984. A call from 710 can come from anywhere in North America.

Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.