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SecurityTrails API









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Queries per month
Queries included. One page includes a maximum of 100 results
50 1,500 20,000 65,000 Flexible
Current DNS records
More than 3 Billion DNS records looked up each day
Historical DNS records
12 years of historical DNS with daily granularity
Get Subdomains
Our API returns a huge collection of subdomains
Domain whois
Current WHOIS
Fetch up-to-date WHOIS information
Historical WHOIS
5 years of historical WHOIS, revealing changes in domain ownership
Reverse WHOIS Searching
Get domains by searching for information in individual WHOIS fields
WHOIS searching ×
Explore IPs
Navigate through IP subnets and neighborhoods
Reverse DNS searching
Reverse PTR searching and summaries
× ×
Advanced features
SQL-Like Query Language
Domain Specific Language for doing complex queries
× ×
Associated Domains
Map a company's footprint by fnding similar domains
× ×
Consulting services
A broad range of assistance in getting started or building custom data sets
× × 1h on-boarding call 1h on-boarding call
For commercial use ×
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Discover Our Cybersecurity Intelligence Data Products


SecurityTrails API

Current and historical security data for infosec companies, researchers and SOCs. Embed our full intelligence data into your own apps. Read More



Web-based tool to explore the surface of any company in the world, including DNS records, associated domains, IP blocks, open ports, and more. Read More


Attack Surface Reduction

Attack surface management made easy with asset inventory, discovery and monitoring to prevent cyber attacks on your organization. Read More


SecurityTrails Feeds

Daily updated high quality data feeds for domain names, subdomains, company assets, SSL certificates and much more. Read More


Explore the public surface area of any organization or single domain name from a friendly web interface. Detect threats before they become a risk.

Full Internet scans: updated daily, curated, and available in seconds to detect open ports, domain intelligence and IP critical data.
Search by: Company name · Domains · Subdomains · TLDs · Registrar · DNS values: MX, NS, CNAME, SOA Mail, IPv4, IPv6 · WHOIS entries · Domain creation and expiry dates.
For any company: find IP blocks · Associated domains · Subdomains · Reverse DNS entries · Certificates · WHOIS entries · DNS history.
IP intelligence data: including accurate IP geolocation · ASN information · IP type · Logged User-agents, and much more.


Starting from $500/seat/month

Get started

Attack Surface Reduction

Gain visibility and manage all your known and unknown assets, detect any infrastructure changes, software versions, subdomains and more.

Attack Surface Reduction

Inventory management: from a single unified web-interface, where you can pivot between IP blocks, domain names, SSL certificates, WHOIS registrars and DNS records.
Attack surface exploration: Discover your company’s attack surface, including open ports, affected IPs, domains, hosting provider and more.
Historical activity: Find the reasons and exact time assets were added or deleted from your infrastructure.
IP tool: Enables you to find IP geolocation, port history, associated devices, IPs, User-agent activity, hosted domains and P2P activity logs.


Curated and up-to-date intelligence feeds for cybersecurity data enrichment to use within your own web, terminal or desktop applications.

Domain data: Discover the complete list of all domains (ccTLD and gTLD), DMARC scans and full list of subdomains.
Company data: Find associated domains to reveal the real domain attribution and explore full certificate transparency log data.
IP & port data: Exhaustive IP scans include active and passive port scans to reveal exposed apps and services.
Custom feeds: Get fully customized cybersecurity data enrichment solutions for your own apps.

Domain feeds

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Trusted by

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

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7-day trial gives you full access to all tools and features of SurfaceBrowser.


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