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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.
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The North American Numbering Plan (NANP) divides the...
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This is a list of North American telephone area codes in...
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The expansion of the North American Numbering Plan (NANP) is...
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A closed numbering plan, as found in North America, features...
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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.