Phone numbers
NANP: North American Numbering Plan
The North American Numbering Plan is the shared telephone numbering system for the United States, Canada and a group of Caribbean and Pacific countries and territories, all under country code +1.
How it works
Every NANP number has ten digits: a three-digit area code, a three-digit exchange and a four-digit line number. The plan is administered centrally, and new area codes are assigned several times a year.
Because +1 covers more than the US and Canada, a number's area code, not its country code, says which country it belongs to.
Related LookValid products
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
New to the API? Start with the quickstart or the API reference. Agents can call the same lookups through the MCP server.