US ZIP code, five digits with an optional ZIP+4 extension. Any isolated 5-digit number matches (French and German postal codes included), so pair it with context or a location-aware config.
Label: US_ZIP
\b\d{5}(?:-\d{4})?\bShip to 12345-6789 Anytown. → 12345-6789ZIP 20500 on the envelope → 205001234123456Tags: us, location, contact