Worldwide postal code finder

There is no complete free worldwide postal database, so this page ships a capped sample of the GeoNames postal export (CC BY 4.0, snapshot 2026-10-31) and states its edges: United Kingdom rows hold outward codes only (SW1A, not SW1A 1AA), Ireland rows hold routing keys only, Netherlands rows hold four-digit areas, and Canada rows hold forward sortation areas. The other countries carry a sample of major codes, not the full national file, so an empty result means the sample has no such row, not that the code does not exist. Coordinates are centroid approximations to four decimals, good for placing a pin on a map rather than addressing an envelope. Everything runs in this tab; nothing is uploaded.