Parent ZIP Codes

zip code demographics Our Parent ZIP Codes product is used when you have ZIP Codes that don't have a corresponding record in our Census Demographics by ZIP Code product. This occurs primarily for PO Boxes where there is no population, therefore there is no census data available. About one fourth of ZIP Codes don't have census demographics.

For instance, if you wanted to get average household income for a list of prospects, but some records have PO Boxes, you can get the demographics for the area where the PO Box is located by using this file to cross-reference the PO Box's ZIP Code with the delivery address ZIP Code in the surrounding area.

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Database Specs & Features

Download Sample Data (CSV)

  • Immediate Download

    Download is available immediately upon purchase and for the duration of the annual subscription.

  • Quarterly Updates

    We update our database as ZIP Codes change.

  • Free FTP/SFTP (upon request)

    To update your database without human intervention, we can provide an FTP address for you to write a script to access. Just request it after purchase.

  • Data Format - CSV

    Comma-Separated Values (CSV) Text File


  • ZIP Code

    Official U.S. Postal Service five digit ZIP Code

  • Parent ZIP Code

    If the ZIP Code is a Point ZIP Code with a corresponding ZCTA, this will have the ZCTA.

  • ZIP Type (Business, Military, etc.)

    U.S. Postal Service ZIP Code database type codes:
    B = Single High-volume Address
    M = APO/FPO Military
    E = P.O. Box Only
    No value indicates standard general delivery

  • State

    Official U.S. Postal Service state abbreviation

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