US Phone Directory

Browse every US area code in one place. This directory organizes all active North American Numbering Plan area codes by numeric group, by state, and as a complete flat list — making it easy to navigate whether you're researching an unknown caller, looking up a reverse phone number, or exploring which regions a specific code covers.

Each area code page draws on publicly available records and aggregated phone data to show the states and cities it serves, common carriers, and general usage patterns. The directory is updated regularly as new codes are activated and overlays are introduced by NANPA.

If you already have a phone number in mind, you can do a reverse lookup at the bottom of this page. Otherwise, drill down through the sections below to find the area code you're looking for and access a full reverse phone lookup.