SA80 Abertawe / Swansea Postcode district SA80: 1 named streets and 6 live postcodes, in Swansea. Streets Siemens Way, Abertawe / Swansea Postcodes SA80 8AB SA80 8AD SA80 8AE SA80 8AF SA80 8AG SA80 8AH Source: ONS Postcode Directory (live postcodes only) and OS Open Linked Identifiers for the streets.