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.
3.4 Trillion
Historical DNS lookups
3 Billion
Historical WHOIS records
805 Million
Total hostnames tracked
487 Million
Domains tracked
"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
IPinfo.io
"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
RecordedFuture
"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
Splunk
SurfaceBrowser™ NEW
Security health from a distance
SurfaceBrowser™ allows you to effortlessly discover the external internet surface of any company using our unified web interface.
SecurityTrails 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.
Whitepaper: Identifying a Company's Online Footprint
Learn how our algorithms work to discover associated domains, IPs, and SSL.
Latest Posts
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lnkr: The New Malicious Browser Extensions Campaign Spreading Across the Net
Browser extensions can be really useful. However, attackers have been targeting the technology since its adoption.
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New SecurityTrails API integration with R programming language
Today we are excited to show you a new API integration, this time with the R programming language by Bob Rudis from Rapid7, already available over Github.
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Product Update: SurfaceBrowser and Stats
Today, we're presenting a series of updates to SurfaceBrowser product and the free tools on SecurityTrails.com
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Analyzing SSL Certificates with SurfaceBrowser
Today we'll explore one of the best ways to analyze and keep your SSL certificates under control.
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DNS Flag Day: What It Is and How It Affects You
DNS Flag day is almost here. But what exactly is the problem with the old DNS servers? And what is EDNS?
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Domain Theft: How to Avoid Buying Stolen Domain Names and Protect Your Own Domains
What would happen if you discovered your email, webpage, and the rest of your web-based services were no longer working?