The World's Largest Repository of historical DNS data

3.4 Trillion Historical DNS Lookups and Counting

…or click here to perform an example search!

Largest Archive of Past and Present DNS History

Search by IP, Hostname, Domain, Keyword—get A, AAAA, MX, NS records and more.

11 Years’ Worth of Historical DNS Data and Counting

Partial access to a database of roughly 3.4 trillion historical DNS lookups as far back as mid-2008.

Powerful API Puts 3.4 Trillion Records at Your Fingertips

The most current DNS and domain intel enriching your datasets, any way you like it, with our powerful API.

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Explore public footprint & find shadow infrastructure

Finding associated domains & domain WHOIS information

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Create the complete shadow infrastructure profile for any company — all IP blocks, Domains owned by the company, Subdomains, Reverse DNS, SSL certificates, and open ports are revealed.

The Data You Want, The API You Need

Usefulness in forensics and investigation

Data for Security companies, researchers and teams to drill down, find suspicious changes to DNS records, and prevent fraudulent or criminal activity in the future.

Access to 1 billion+ passive DNS datasets

Elsewhere, other archives use passive DNS to watch real queries coming through your ISP. DNS Trails forces data lookup everyday, synthetically checking everything everyday.

11 years of DNS history & a powerful API

Fully-indexed historic and current DNS record history, WHOIS data and WHOIS changes, daily-updated domain database, and passive DNS datasets easily integrated with our API.