View Full Version : Zip+4 from usps.com

11-25-2011, 11:10 PM
The USPS website has a tool that you can supply an address and it will return the address with the correct plus4.

Here is the URL:

In PHP, is there a way to use this from my website? I was thinking someone would be able to update addresses in a mysql db by running each address through the script.

11-26-2011, 12:34 AM
I think they have web developer API's to access their database.
Just out of curiousity, I registered to access it. I think I have to
wait for an email back on permission to access it.