Based off of the free ZIP code database provided by [federalgovernmentzipcodes.us](http://federalgovernmentzipcodes.us/) ("primary location only" dataset).
This library generates a [lookup map](https://crates.io/crates/phf) from a CSV file at compile time. Depending on this library comes at a roughly 11MB binary and memory cost.
[Documentation](http://skylerlipthay.github.io/zip_codes/doc/zip_codes/)