API and Data Services for Top Security Companies

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SecurityTrails API

APIs for Security Companies, Researchers and Teams

Tap into a treasure-trove of cyber security gold and get the info you can’t find anywhere else. We’re proud to offer security analysts and developers the most current DNS and domain intel with our powerful API.

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3.4 Trillion

Historical DNS lookups

3 Billion

Historical WHOIS records

909 Million

Total hostnames tracked

323 Million

Total Domains tracked



Coventry University

Recorded Future

IP Info


Picture of Ben Dowling

"We spent a ton of time and effort building out our own domain lists, but we gave up when we found SecurityTrails – the data was better than anything else we've seen, and allowed us to focus on our core product."

Ben Dowling
Picture of Bill Ladd

"SecurityTrails solves the headache of accurately mapping a company's footprint with data you can't find anywhere else. If you are a security analyst or developer, you will get tremendous value from the most current domain intel through their API."

Bill Ladd

"SecurityTrails is my source of truth when it comes to threat hunting and research. The speed of the API is crazy and the integrations with automation tools and SIEM tools makes it an easy choice."

Mickey Perre

SecurityTrails Feeds

SecurityTrails Domain Feeds.

High-quality data feeds for data enrichment

We use a sophisticated process of parsing zone files for Generic Top Level Domains (gTLDs) and recreating country code Top Level Domains (ccTLDs). We make them available from simple CSV download files or APIs that you can integrate into your application.

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Whitepaper: Identifying a Company's Online Footprint

Learn how our algorithms work to discover associated domains, IPs, and SSL.

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