🛠️ FREE DEVELOPER TOOL
Free UK Postcode & Address Explorer
Search over 21.1 million verified UK addresses in real-time. Look up official Ordnance Survey UPRNs, get high-precision GPS coordinates, and inspect the exact JSON payload returned by our ultra-fast Go API.
Try example:
What You Can Discover With FastAddress UK
- Ordnance Survey UPRN: Authoritative 12-digit building identifier mapping to official government and council datasets.
- WGS84 Coordinates: Exact latitude and longitude for mapping, distance matrix calculation, and geofencing.
- Normalized Formatting: Standardized building number, street line, postal town, and postcode format.
- Real-time Autocomplete: Sub-15ms fuzzy search matching typos and partial keystrokes.
FOR DEVELOPERS & PRODUCT TEAMS
Integrate Address Search in 5 Minutes
Need address autocomplete in your React, Next.js, Shopify, or mobile app checkout? Use our simple REST endpoint.
curl "https://fastaddress.ahm-labs.com/api/v1/autocomplete?q=10+Downing+Street"Frequently Asked Questions
What is an Ordnance Survey UPRN?
A Unique Property Reference Number (UPRN) is the authoritative identifier assigned to every geographic addressable location in Great Britain. It allows linking data across EPC records, Land Registry titles, planning portals, and local council records.
Can I use this tool for commercial projects?
Yes! You can use this web explorer freely for ad-hoc lookups. For production applications, checkouts, or bulk geocoding, generate an API key via our RapidAPI developer portal.