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  • Area Code and Prefix Lookup by Geographic Location
    This lookup is used to find the active telephone exchanges, area codes and prefixes or NPA NXX, for any United States or Canadian geographic location
  • Area Code Lookup - NPA NXX
    Area Code Lookup Search by NPA NXX, ZIP Code, City, State, or any other of our data fields
  • Local calling guide: NPA-NXX search
    Effective date searches are available only for US area codes Our sources for non-US NPA-NXX data do not provide this information If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero
  • NPA NXX: What Area Codes and Exchanges Mean
    How North American phone numbers are structured Understanding NPA (area code) and NXX (exchange) codes, their role in call routing, and how to read telecom numbering data
  • What do the terms NPA and NXX mean? | Bandwidth Help Center
    What is NXX? NXX, also known as the Central Office Code or Exchange, is a three-digit code that forms the second part of a 10-digit phone number For example: In the phone number 555-101-1234, the NXX is 101
  • NXX definition (Phone Scoop)
    NXX is most commonly used to refer to three-digit code that forms the second part of a 10-digit North American phone number (digits 4-6) This is also known as the "central office code" or
  • NXX - NENA Knowledge Base
    Most commonly used to refer to the three-digit code that forms the second part of a 10-digit North American phone number (digits 4-6) This is also known as the "central office code" or "exchange " Traditionally, in the age of competing phone companies, each NXX is assigned to one company
  • United States Area Codes and Phone Numbers | Whitepages
    Find any United States phone number or browse by area code to lookup owner information and trustworthiness of any phone number
  • North American Area Codes - AT T
    rth American Area Codes The Numbering Plan Area code is the first three digits of a 10 di it NANP telephone number The NPA, combined with the Central Office Code or NXX, is the Destin tion Code being reported An NPA is commonly re erred to as an Area Code The number format is aintree, Well utheaster rnia US San Jose 670
  • NALENND North American Local Exchange NPA NXX Area Code Database
    Enter any United States, Canadian, or Caribbean telephone number, including area code, to look up details about the exchange NALENND, the North American Local Exchange NPA NXX Database, complete coverage of the North American Numbering Plan and the public switched telephone network





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