Address data infrastructure you can trust.
Since 2012, IDDQD has specialised in producing, distributing and operating address and geospatial data services that power businesses globally.
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One global team, over a decade of expertise.
Over a decade of experience in global address verification has shown us no two countries are alike. That is why we have built a global team with distinct local solutions to solve real local problems.
A consolidated UK dataset combining Royal Mail, Ordnance Survey, British Geological Survey and more. Ideal Postcodes also helps UK businesses expand overseas, serving localised data sources for key markets including Ireland, Europe and the United States.
US and international address verification. AddressZen provides CASS certified address verification services as well as global address verification solutions for businesses operating in multiple markets.
UPRN and UDPRN lookup: the unique property identifiers that join UK property, planning and utility datasets together.
Free, open-source postcode and geolocation API for the UK. Open data, openly served, and used by thousands of developers.
Announcements and press releases.
IDDQD v Codeberry named a UK Impact Case at the Managing IP EMEA Awards 2026.
Ideal Postcodes is the default installed address lookup in Business Central for the UK and Ireland, jointly developed and supported by Microsoft and IDDQD Limited.
Annual surveillance audit completed with no major non-conformities.
The High Court found GetAddress.io and its director breached Ideal Postcodes' terms and infringed its database rights, awarding additional damages.
