Our UK Postcode API unifies seven authoritative address, geocode, and demographic datasets. One key, one request, every field you need.
30M+
Royal Mail delivery points
31.2M
OS NGD address records
7
integrated datasets
1 call
to retrieve all fields
Data Sources
Seven datasets, one endpoint
Every API response automatically combines fields from the relevant datasets for the queried postcode or address — no manual joins required.
Royal Mail PAF
The gold-standard address database for the UK. 30M+ delivery points covering every addressed property across England, Scotland, Wales, and Northern Ireland.
Records
30M+
Coverage
GB + NI
Updates
Monthly
Key Fields
UDPRN
Building Name/Number
Street
Post Town
Postcode
Sub-building
Organisation
Delivery Point Suffix
OS NGD Address (GB)
Ordnance Survey National Geographic Database address layer. Provides UPRN, per-address geocoordinates, positional accuracy rating, and Welsh address equivalents.
Records
31.2M
Coverage
Great Britain
Updates
Quarterly
Key Fields
UPRN
UDPRN
Latitude/Longitude
Easting/Northing
Positional Accuracy
Match Type
Welsh Address Fields
OS NGD Postcode (GB)
Postcode-level geocoordinates and delivery statistics from the OS NGD postcode layer. Includes postcode centroid, delivery counts, and postcode classification.
Records
1.9M
Coverage
Great Britain
Updates
Quarterly
Key Fields
Postcode
Centroid Lat/Lon
Easting/Northing
Delivery Count
Postcode Type
Grid Reference
NSPL (National Statistics Postcode Lookup)
ONS postcode-to-geography lookup. Maps every live UK postcode to administrative, electoral, and statistical geographies including LSOA, ward, district, and region.
Records
2.6M
Coverage
UK + Crown Dependencies
Updates
Quarterly
Key Fields
Ward
District
County
Region
Country
LSOA
MSOA
CCG
Grid Reference
Country ISO
EA Flood Risk (RoFRS)
Environment Agency Risk of Flooding from Rivers and Sea dataset. Classifies every UK postcode into High, Medium, Low, or Very Low flood risk using spatial intersection.
Records
1.6M+
Coverage
England
Updates
Annual
Key Fields
Flood Risk Band
Risk Source (River/Sea)
Postcode Coverage
Index of Multiple Deprivation
ONS/DCLG deprivation scores mapped at postcode level. Includes overall IMD score, decile rank, and individual domain scores (income, employment, health, education, crime).
Records
1.6M+
Coverage
England
Updates
Every 4–5 years
Key Fields
IMD Score
IMD Decile
Income Rank
Employment Rank
Health Rank
Education Rank
Crime Rank
Housing Rank
OS Open Names (Place)
Ordnance Survey open dataset of named places, settlements, and localities across Great Britain. Used to derive the nearest named place for any postcode lookup.
Records
3.2M
Coverage
Great Britain
Updates
Biannual
Key Fields
Place Name
Local Type (city/town/village)
County
Country
Postcode Sector
Easting/Northing
Field Coverage
What's in a single API response
Every field returned by the UK Postcode API and which underlying dataset provides it.
| Field | Royal Mail PAF | OS NGD Address | NSPL | Other Source |
|---|---|---|---|---|
| Full formatted address (line_1–3) | — | — | ||
| UDPRN | — | — | ||
| UPRN | — | — | — | |
| Per-address lat/lon | — | — | — | |
| Postcode centroid lat/lon | — | — | ||
| Easting / Northing | — | — | ||
| Ward / District / County | — | — | — | |
| Country (ISO 2 / ISO 3) | — | — | — | |
| Nearest place name | — | — | — | OS Open Names |
| Welsh address equivalent | — | — | — | |
| Flood risk band | — | — | — | EA RoFRS |
| IMD score & decile | — | — | — | ONS IMD |
| Delivery count | — | — | — | |
| Postcode type (S/L) | — | — |
All datasets are used under licence. View third-party licence details →
Data Freshness
Always up to date
Royal Mail PAF — new builds, address changes, and terminated records updated every month.
OS NGD Address & Postcode and NSPL refreshed every quarter with the latest OS release.
EA Flood Risk updated following each annual RoFRS data release from the Environment Agency.
Start querying all seven datasets today
Free tier included. No credit card required. Production-ready in under 5 minutes.