National Statistics UPRN Lookup: Address-to-Geography Mapping for Great Britain

490 MB of data mapping Unique Property Reference Numbers (UPRNs) for Great Britain addresses to statutory administrative, electoral, health, and other statistical geographies as of March 2026. The Office for National Statistics produces this lookup every six weeks to complement Ordnance Survey AddressBase®. It uses 'best-fit' allocation from 2021 Census output areas, with National Parks and Workplace Zones using 'exact-fit'.

Use Cases

• Link address-level data to administrative boundaries for policy analysis based on the statutory geography mapping.
• Enrich address records with electoral constituency information for voter registration or demographic studies.
• Perform health service planning by associating addresses with healthcare geography units.
• Create 'best-fit' statistical aggregations for areas where exact address boundaries are unavailable.
• Update geospatial joins in data pipelines with the six-weekly updated lookup to maintain current mappings.

Strengths

• File size is 490 MB, indicating a substantial dataset.
• Updated every six weeks, suggesting regular maintenance.
• Based on AddressBase® Epoch 125 and 2021 Census output areas, implying authoritative source data.
• Includes mapping to multiple statutory geographies (administrative, electoral, health).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Contains intellectual property from Royal Mail, Gridlink, Ordnance Survey, and ONS, which may restrict usage.

Provenance

Source

Office for National Statistics (ONS Geography).

Collection Method

'Best-fit' and 'exact-fit' allocation from 2021 Census output areas to link UPRNs from AddressBase® to geographies.

Time Range

Snapshot as at March 2026.

Freshness

Updated every six weeks; last metadata update was 2026-07-09.

Geography

Great Britain.