What the Terms "NPA" and "NXX" MeanFollow
When ordering or porting telephone numbers, you may hear the terms “NPA” and “NXX” thrown around a lot, as these are standard industry terms.
|NPA:||This stands for Numbering Plan Area. You probably know it as the area code, the three-digit number that identifies the telephone service region. You’ll see NPA and area code used interchangeably in our portals and training videos.|
|While the Area Code identifies the telephone service region, it’s possible for a single NPA to be present in more than one rate center.|
|For example: The 305 area code in Florida is present in the following rate centers: Keys, Miami, Homestead, North Dade, and Perrine. If you order a number in NPA 305, you can get a telephone number in any of those rate centers.|
|NXX:||This is the three-digit code that forms the second part of a 10-digit telephone number. The NXX is also known as the “central office code” or “exchange”.|
|For example: if you had the phone number 555-101-1234 the NXX would be 101.|
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