NPA-NXX Numbers

An informational guide and lookup tool for NPA-NXX codes in North America.

Understanding NPA-NXX

NPA-NXX refers to a system of telephone number formats used in the United States, Canada, and other parts of North America under the North American Numbering Plan (NANP). Here’s how it breaks down:

Example of NPA-NXX:

Consider the phone number (212) 555-1234:

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