A map of the United States divided by the first three digits of the ZIP Code Tabulation Area. Contains only the 50 states.
Zip 3 Shape file downloaded from http://www.vdstech.com/usa-data.aspx. The site explicitly lists the data as "Licensing: Public Domain."
Converted into SVG with Mapshaper. Mapshaper is available under MPL 2.0, but any files generated with the software are not governed by this license, per https://www.mozilla.org/en-US/MPL/2.0/FAQ/.
Heavily modified by me. I claim no copyright.
Modifications from the community are encouraged.
Magog the Ogre (talk) (contribs)