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What is the North American numbering plan?
What is a numbering plan area code?
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International access. 011. List of dialing codes. The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1.
- List of North American Numbering Plan area codes - Wikipedia
Each NPA is identified by one or more numbering plan area...
- List of North American Numbering Plan area codes - Simple ...
This is a list of North American telephone area codes in...
- North American Numbering Plan - Simple English Wikipedia, the ...
The North American Numbering Plan (NANP) is a telephone...
- List of North American Numbering Plan area codes - Wikipedia
The North American Numbering Plan ( NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1. Some North American countries, most notably Mexico, do not participate with the NANP.
The United States received seventy-seven area codes, and Canada nine. The initial system of numbering plan areas and area codes was expanded rapidly during the ensuing decades, and established the North American Numbering Plan (NANP).
A closed numbering plan, as found in North America, features fixed-length area codes and local numbers, while an open numbering plan has a variance in the length of the area code, local number, or both of a telephone number assigned to a subscriber line. The latter type developed predominantly in Europe.
