The Scottish Postcode Directory (SPD) is the definitive source for postcode geographies in Scotland, updated twice a year by National Records of Scotland (NRS). It is a comprehensive geographical lookup file that maps all postcodes in Scotland to higher geographical levels, such as council areas and data zones, and contains both current and deleted postcodes. The SPD includes:

• A list of live and deleted postcodes across Scotland (Postcode Index).

• Mapping of postcodes to higher geographical areas like census output areas, data zones, and council areas.

• Digital boundaries for live postcodes, sectors and districts.

• Digital point locations for live postcodes, sectors and districts (grid references).

The SPD is used to link postcodes to other data sources and higher geographies, and helps to understand and analyse geographical patterns in Scotland. Note the published version of the SPD does not include Royal Mail information on Delivery Point Count (DPC), Delivery Point Count Non-Residential (DPCNR) or Household Count (HC). Those interested in this information should enquire with geographycustomerservices@nrscotland.gov.uk.