GBEurope · Western Europe

United Kingdom Address Validation API

Validate and standardise United Kingdom addresses in real time. Get a matched address, geocoordinates, confidence score, and Postcode data via a single API call.

AN NAA / ANN NAA
Postcode
Royal Mail PAF
Data Source
English
Languages
HIGH
Max Confidence

United Kingdom Address Validation Demo

Confidence:HIGH
POST /enrich — ResponseSample
{
  "_note": "Sample response — enter any address and click Validate for live data",
  "valid": true,
  "canonical_address": "10 Downing Street, Westminster, London, SW1A 2AA",
  "confidence": "HIGH",
  "delivery_risk": "low",
  "matched_address": {
    "line1": "10 Downing Street",
    "city": "London",
    "postal_code": "SW1A 2AA",
    "country": "United Kingdom",
    "iso2": "GB"
  },
  "geocode": {
    "lat": 51.5074,
    "lng": -0.1278
  },
  "data_source": "Royal Mail PAF",
  "issues": []
}

United Kingdom Address Format

UK addresses follow the Royal Mail PAF standard: building name or number, street name, locality, town, county, and postcode. The postcode uniquely identifies a delivery point with sub-100m accuracy.

Postal Code Name
Postcode
Format
AN NAA / ANN NAA
Official Languages
English
Sample address:
10 Downing Street, Westminster, London, SW1A 2AA
Major cities:
LondonManchesterBirminghamEdinburghLeedsGlasgowLiverpool

Integration Code

curl -X POST https://agent.apitier.com/v1/enrich \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"address": "10 Downing Street, Westminster, London, SW1A 2AA"}'

Frequently Asked Questions

What address format does United Kingdom use?
UK addresses follow the Royal Mail PAF standard: building name or number, street name, locality, town, county, and postcode. The postcode uniquely identifies a delivery point with sub-100m accuracy.
What is a Postcode in United Kingdom?
United Kingdom uses a Postcode with the format AN NAA / ANN NAA to identify delivery areas. The APITier Address Agent API validates and standardises addresses including the Postcode as part of the response.
How do I validate a United Kingdom address via API?
Send a POST request to https://agent.apitier.com/v1/enrich with your address string in the request body and your API key in the x-api-key header. The response includes the standardised United Kingdom address, geocoordinates (lat/lng), a confidence score (HIGH/MEDIUM/LOW), and data source information.

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