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Find the area code for any location in North America, including the United States, Canada, and some Caribbean countries. The web page shows the numerical order, territory, date, and notes for each area code, including the overlay and split history.
Area code 323 covers much of the City of Los Angeles and several inner suburbs, originally split off from 213 in 1998. It will be overlaid by area code 738 in 2024. See the full list of California area codes and their service areas.
Find out the current and future area codes for different regions of New York state, including New York City, Long Island, and upstate New York. See the map, the year of assignment, and the overlays for each area code.
Learn about the history and development of the North American Numbering Plan (NANP), which was established by AT&T in 1947 to enable direct distance dialing across the continent. The article covers the initial numbering plan areas and area codes, the expansion and changes over time, and the technical specifications and requirements.
Find the area codes for different regions or countries in North America, including the original NANP and other autonomous plans. Learn how to format and dial telephone numbers in Mexico, Greenland, and Saint Pierre and Miquelon.
Find out the telephone area codes of Pennsylvania and their locations on an interactive map. Learn about the history and current status of area code splits and overlays in the state.
Find the area code for Cincinnati and other regions in Ohio. The web page shows the history, regions, and creation dates of Ohio area codes, including the new 283 overlay for 513.
Find out the area codes for different regions and cities in New Jersey, a U.S. state. Learn about the history and current status of the North American Numbering Plan and the overlay area codes.