YO90 York Postcode district YO90: 4 named streets and 10 live postcodes, in York. Streets Leeman Road, York Rougier Street, York Station Road, York Wellington Row, York Postcodes YO90 1HX YO90 1PP YO90 1UT YO90 1UU YO90 1WB YO90 1WR YO90 1WT YO90 1WU YO90 1WW YO90 1YB Source: ONS Postcode Directory (live postcodes only) and OS Open Linked Identifiers for the streets.