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  1. TelcoData.US: Welcome to the Telecommunications Database

    User assumes all risk for any loss or gain resulting from use of this data. Although I strive for accuracy and prompt updates of changed information, it is possible that there may be errors.

  2. TelcoData.US: Search by Area Code / Exchange

    User assumes all risk for any loss or gain resulting from use of this data. Although I strive for accuracy and prompt updates of changed information, it is possible that there may be errors.

  3. TelcoData.US: Search Area Codes / Exchanges by CLLI

    User assumes all risk for any loss or gain resulting from use of this data. Although I strive for accuracy and prompt updates of changed information, it is possible that there may be errors.

  4. TelcoData.US: Downloads

    Telcodata.US - The Telecommunications DatabaseIf you have sufficient subscription access, these files will be available for download. If you do not see the "Download Name" text as a …

  5. TelcoData.US: Frequently Asked Questions

    It provides a subset of the data in machine readable form, and a few convenient ways of looking up data (such as making the new exchanges report show multiple years) and a file scrubber …

  6. TelcoData.US: Search by Area Code / Exchange

    Telcodata.US - The Telecommunications DatabaseInput an Area Code (required) followed by the Prefix, or Exchange (optional): - If you were a paid member, you could be ...

  7. TelcoData.US: View switch detail by CLLI

    Telcodata.US - The Telecommunications DatabaseInput a switch CLLI code: (Building CLLIs will not work here)

  8. TelcoData.US: Search for Area Codes / Exchanges by OCN

    Warning: site is in maintainance mode, data may not be accurate and some queries may not work! OCN: If you were a paid member, you could be loading this into any version of Excel or …

  9. TelcoData.US: View switch detail by CLLI

    Telcodata.US - The Telecommunications DatabaseInput a switch CLLI code: (Building CLLIs will not work here) Tip: If you do not know the full CLLI for the switch you're looking for - use the …

  10. TelcoData.US: Search by Area Code / Exchange

    Warning: site is in maintainance mode, data may not be accurate and some queries may not work! Input an Area Code (required) followed by the Prefix, or Exchange (optional):