GeoNames postal data: https://download.geonames.org/export/zip/ZA.zip
Downloaded 16 October 2026. Archive listing last modified 15 June 2015.
3920 source rows; approximate estimated coordinates; not exhaustive/current postal authority. CC BY 4.0. https://www.geonames.org/ https://creativecommons.org/licenses/by/4.0/
Transformed: indexed by four-digit code, deduplicated exact records.
Province derived by point-in-polygon using Department of Water and Sanitation province layer (MDB-compiled), fetched 16 October 2026: https://gia.dws.gov.za/hosting/rest/services/Provinces/MapServer/0
Province is inferred from approximate coordinate, not source postal authority. Missing matches remain blank.