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      • The first three digits of a local seven-digit telephone number. Assigned to a specific switch in a central office. Together, the NPA-NXX denotes the original carrier and central office switch assigned to a particular number. Historically, NPA-NXX combinations provided a reliable way to determine the carrier and approximate location of a number.
      trestleiq.com › knowledge-base › understanding-npa-nxx-and-the-implications-of-number-portability

      Understanding NPA-NXX and the Implications of Number Portability

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  3. www.npanxxsource.com › nalenndNorth American Telephone Exchange Lookup by NPA NXX

    Home. North American NPA NXX Lookup. Central Office Details From NPA NXX. This lookup uses the North American NPA NXX Wire Center Edition Database and supplemental data to find the Wire Center, Rate Center, locality, LATA, carrier, and other details associated with any United States or Canadian NPA NXX combination.

  4. www.area-codes.com › searchArea Code Lookup (NPA NXX)

    1-800-425-1169. Area Code Lookup - NPA NXX. Lookup any area code by area code, prefix, city, state, zip code, county or any of the fields shown above. Only one field needs to be entered but you can filter the results by entering information in additional fields. Area Code Lookup.

  5. www.localcallingguide.com › lca_prefixLocal calling guide: NPA-NXX search

    Apr 16, 2024 · Local calling guide: NPA-NXX search. Area code/prefix search. Search area code/prefix ( NPA / NXX) NPA NXX Block OCN Region LATA LIR Switch. Effective date within past or next days. Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.

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  7. www.npanxxsource.com › area-code-lookupArea Code and Prefix Lookup by Geographic Location

    Find all NPA NXX used in geographic area. This lookup uses the North American NPA NXX Rate Center Edition Database to determine the telephone exchange Rate Centers, area codes (NPA), and prefixes (NXX) used in the area surrounding any United States, Canadian, or Caribbean location.

  8. www.telecomdb.com › npa-nxx-look-upNPA NXX Lookup Tool | NPA NXX Database

    Search by NPA and NXX, State and City or by LATA. Select from several options below. KFR's free NPA-NXX lookup is great for checking which area codes and prefixes are assigned to a given rate center, what rate center a particular NPA-NXX is in or what area codes are in a specific state.

  9. en.wikipedia.org › wiki › North_American_Numbering_PlanNorth American Numbering Plan - Wikipedia

    Format. NXX NXX-XXXX. Access codes. Country code. 1. 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.

  10. trestleiq.com › knowledge-base › understanding-npaUnderstanding NPA-NXX and the Implications of Number Portability

    Feb 28, 2024 · The North American Numbering Plan (NANP) is a system of three-digit area codes and seven-digit telephone numbers that directs telephone calls to particular regions on a public switched telephone network (PSTN). Within this system, the NPA-NXX provides detailed information about the origination of a telephone number. What is NPA-NXX?

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