FIPS

Source

The "US Zipcodes to County State to FIPS Crosswalk" data is available on the Kaggle website:

Description of the Data

This data enables linking of counties, states, and zip codes.

The source data set is called ZIP-COUNTY-FIPS_2017-06.csv, indicating that (likely) this data is from June 2017.

Transformations to the original data source

None.