Area Code Lookup
Enter a three-digit area code to see which state it serves, the time zone there and the other codes in the same state.
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Area codes are assigned under the North American Numbering Plan. Many metro areas have overlays, where two or more codes cover the same place, and people keep their numbers when they move. So a code shows where a number was first issued, not where the phone is today.
Keeping current
New overlay codes are added most years. The North American Numbering Plan Administrator publishes the official list.