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SecurityTrails API

Data for Security companies, researchers and teams. Fast, always up API that allows you to access current and historical data. The API is paid via a simple pricing structure that allows you to embed our data into your applications.

Signup for an API key now

PwC

Microsoft

Coventry University

What can you do with the SecurityTrails API?

DNS History

Request

curl --request GET \
  --url https://api.securitytrails.com/v1/history/trello.com/dns/a \
  --header 'apikey: >'

Response


Subdomains

Request

curl --request GET \
  --url https://api.securitytrails.com/v1/domain/trello.com/subdomains \
  --header 'apikey: >'

Response


WHOIS History

Request

curl --request GET \
  --url https://api.securitytrails.com/v1/history/twilio.com/whois \
  --header 'apikey: >'

Response


Associated Domains

Request

curl --request GET \
  --url https://api.securitytrails.com/v1/domain/twilio.com/associated \
  --header 'apikey: >'

Response


IP Subnet

Request

curl --request POST \
  --url https://api.securitytrails.com/v1/ips/stats \
  --header 'apikey: >' \
  --header 'content-type: application/json' \
  --data '{
  "query": "ip = '\''5.175.0.0/12'\''"
}'

Response


IP DSL queries are only available with our professional plan or higher.

PTR Search (stats)

Request

curl --request POST \
  --url https://api.securitytrails.com/v1/ips/stats \
  --header 'apikey: >' \
  --header 'content-type: application/json' \
  --data '{
  "query": "ptr_part = '\''amazon.com'\''"
}'

Response


IP DSL queries are only available with our professional plan or higher.

View our complete API reference

Key features

DNS Record History

It’s all here, fully-indexed historic and current data, ready to be accessed asap.

Domain Historical WHOIS Data

Search nearly 3 billion historical and current WHOIS data and WHOIS changes.

Domain Names

Search our daily-updating database – it’s over 203 million deep and growing.

Website Technologies

Know what tech sites are running, and search by over a thousand technologies.

Passive DNS

Get monthly access to over 1 billion passive DNS datasets.

Instant IP & Domain search

Get the most current intel when it comes to IPs, domains, and hostnames in real-time.

Hostname Information

Get the scoop on www subs and all known subdomains.

Tagging

Searching is fast and simple with tagged and indexed intel.

All the data you need,
all in one place

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

709 Million

Total hostnames tracked

444 Million

Domains tracked

The SecurityTrails API makes it simple

Cyber Forensics

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

Powering Reputation Scoring Systems

Get the info that helps stop bad actors, know what domain and IPs they use and take charge.

Threat Hunting

Track down command and control servers and get the latest malware info.

Online Fraud Investigation

Research fraudulent activity and have the intel needed to stop them in the future.

Mergers and Acquisitions

Get the full picture when it comes to knowing an entity’s online assets and hidden details.

Brand Protection

Know instantly if your brand’s trademark or copyright is being used on fraudulent domains.

Power Next-gen Firewalls

Big data makes for better security. Put reputation scoring and indexed intel to work in making your site more secure.

Crime investigation

Gathering evidence has never been easier, follow the links and get all the facts.

Get started now!

Use SecurityTrails API to fetch any domain and whois related data: Our easy to use API can help you enriching your datasets or adding value to your service.

See API docs Signup for an API key