The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Numbering Zone 1 and has the country code 1. Some North American countries, most notably Mexico, do not participate in the NANP.
- Country
- American Samoa, Anguilla, Antigua and Barbuda, The Bahamas
- Inception
- October 1947
- Website
- https://www.nationalnanpa.com/about_us/abt_nanp.html
