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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    Telephone Area Codes

    Metadata Updated: October 11, 2025

    Maryland Telephone Area Code Boundaries represents the telephone area codes for the State of Maryland. They are also known as Numbering Plan Areas (NPA). The Numbering Plan Areas reflect current and accurate boundary changes both where new NPAs split from existing NPAs and where new NPAs overlay existing NPAs. When an NPA is split, the geographic area covered by the old area code is divided geographically, with one portion retaining the previous area code and the other switching to the new area code. When a new NPA is added as an overlay, the old area code remains unaffected. Instead, all or part of the land covered by the old area code is now covered by the old and new area codes.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Created Date July 26, 2025
    Metadata Updated Date October 11, 2025

    Metadata Source

    Harvested from md json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 26, 2025
    Metadata Updated Date October 11, 2025
    Publisher opendata.maryland.gov
    Maintainer
    Identifier https://opendata.maryland.gov/api/views/smyu-49g4
    Data First Published 2025-07-22
    Data Last Modified 2025-10-06
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://opendata.maryland.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id ba050306-f9c1-4df5-afb8-00e4b6fdf7d1
    Harvest Source Id ee165ef5-7b35-41a7-b3a5-5479c71b0e58
    Harvest Source Title md json
    Homepage URL https://opendata.maryland.gov/d/smyu-49g4
    Source Datajson Identifier True
    Source Hash 2f41ce44939fda318426098ea008c7e770e9650735d835b88f252cb39453d67d
    Source Schema Version 1.1

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