US ZIP Code lookup: city, state and approximate coordinates derived from GeoNames postal-code data.
Source: https://download.geonames.org/export/zip/US.zip
Downloaded: 2026-09-29
License stated in the downloaded dataset: Creative Commons Attribution 4.0 (https://creativecommons.org/licenses/by/4.0/).
Attribution: GeoNames — https://www.geonames.org/
Changes: selected US fields, deduplicated ZIP codes, converted tab-separated records to JSON grouped by the first two ZIP digits.
Provided as-is. Coordinates are approximate and do not represent driving distances.