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.
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
OpSec: A Vital Part of Any Cybersecurity Program
We all have something to hide, and it's been like that since the beginning of humankind.
New API Scroll Endpoint + Return IPs Feature Available
We are introducing two new features to our powerful domain and IP intelligence API.
OSINT Framework: The Perfect Cybersecurity Intel Gathering Tool
OSINT plays a big role in data collection. But what is OSINT?
The Top 5 Best DNS Servers for improving Online Privacy & Security
DNS, also known as the Domain Name System, is one of the most significant internet services. Without it, we simply wouldn't be able to browse the Internet.
Working Remotely: One Year as a Fully Remote Team
At the end of our first year as a fully remote team, located around the world, we are glad to share our journey, its ups and downs, and what we’ve learned.
What is Passive DNS? And Why Should You Use a Passive DNS API?
Many of you haven't heard about passive DNS, so today we'll explain this fascinating component powering our toolkit.