National Statistics UPRN Lookup: User Guide for Address and Postcode Data

Government Digital Service provides a user guide for the National Statistics UPRN Lookup, detailing its content, methodology, and quality. The guide is available in PDF and ODT formats and was last updated on the platform in August 2025. It explains the methodology for assigning geographic areas to postcodes and includes annexes with supporting information.

Use Cases

• Understand the data structure and quality of the NSUL based on the described directory content and formats.
• Apply the methodology for assigning areas to postcodes described in the guide for geographic analysis.
• Assess the suitability of the NSUL data for a project based on the documented limitations and recent changes.

Strengths

• Includes detailed supporting information in various annexes and tables.
• Provides documentation on data currency, methodology, and recent changes impacting the data.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Government Digital Service

Collection Method

Administrative data compilation, methodology described in the guide.

Time Range

Reference data from January 2023.

Freshness

Last updated 2025-08-11 08:15:08; freshness should be verified.

Geography

Likely United Kingdom, based on 'National Statistics' and 'UPRN' context.