{
 "built": "2026-09-24",
 "rows": 41682,
 "withZcta": 33791,
 "sources": {
  "geonames": "US+PR postal codes, downloaded 2026-09-24",
  "gazetteer": "2024 ZCTA",
  "acs": "2020-2024 5-year",
  "relationship": "2020 ZCTA-county"
 },
 "attribution": "GeoNames (CC BY 4.0), US Census Bureau, OpenStreetMap contributors via timezone-boundary-builder (ODbL)"
}