NSUL: National Statistics UPRN Lookup for UK Postcodes (October 2025)

A user guide for the National Statistics UPRN Lookup (NSUL) published by the Office for National Statistics. The guide details the methodology for assigning statistical areas to postcodes, data formats, quality, and limitations. It was updated to version 2 on 11 June 2026 to reflect a corrected data file.

Use Cases

• Link property-level data to administrative geographies based on the UPRN-to-postcode mapping methodology described.
• Assess data quality for UK address-based analyses based on the data quality and limitations section.
• Understand changes in UK statistical geography assignments based on the details of recent changes provided.

Strengths

• Official source from the UK's Office for National Statistics.
• Includes detailed methodology for area assignment and data quality assessment.
• User guide is 369 KB and available in PDF and ODT formats.

Limitations

• The description provides no column names or sample data, making field-level assessment impossible.
• The actual dataset's row count, file size, and license are unknown.
• Data may reflect geographic or temporal bias inherent to the UK's national statistics.

Provenance

Source

Office for National Statistics

Collection Method

Likely compiled from official UK address and postcode registers.

Time Range

Snapshot from October 2025.

Freshness

Last updated 2026-06-17 21:01:08.241404; data snapshot is from October 2025.

Geography

United Kingdom