Check your list of US addresses and add Zip+4 data using this Bulk Address Correction tool from CDX Technologies. Use your existing CDXStreamer account or pay $.01 per address using your credit card or PayPal (minimum charge of $9.95). Up to 20,000 address can be processed in a single report. For a quick review of how to use this tool check out this Youtube video.

Upload your input address file in csv or Excel .xlsx format in a single worksheet. Be sure to include address data (address, city, state) in consecutive columns. Do not include header text. Click here for further instructions on how to format your address list.

An example of an single column input file can be downloaded here. A multi-column input file is available at this link. These inputs will produce the following output data file . The output data file is in exactly the same row order as the input file including blanks and errors.

Simply drag & drop or select your data file below to begin!


Drop your CSV or Excel file here

How It Works


Export or create your address file following our formatting instructions and select your file from your system or drag and drop your file to the drop zone.


Preview a select number of output data values. This will allow you to test your address formatting and fix any issues you may have.


Use your CDXStreamer account or complete a one-time purchase using your major credit card or your PayPal account. You will receive an email receipt for your purchase.


Download your output file containing verified data for all of your addresses. If you have any questions or concerns contact us at 973-895-5542 or

Verified Preview Results

Click the Next button to download your data file!

Below is a preview of data processed from your file.

Your Entry Full Address Street Street2 City State Zip + 4 County County FIPs State State FIPs Timezone DPBC

The use of this tool is subject to the following End User License Agreement.