The World's Largest Repository of historical DNS data

Data for security companies, researchers and teams who need to drill down, find suspicious changes to DNS records, and prevent future fraudulent or criminal activity.

Want more out of our API? Get full access.

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.

The Data You Want, The API You Need

Cyber Forensics

Find suspicious changes to DNS records and see how incidents correlate.

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.

Get the most out of our API

Passive DNS
Instant IP & Domain search
Hostname Information
Tagging

DNS Record History
Domain Historical WHOIS Data
Domain Names
Website Technologies

Get Started for Free