SecurityTrails: analyze DNS and subdomains of any website

securitytrails is an OSINT tool that collects information from millions of websites around the world. This tool scans and collects information from subdomains and DNS records. This tool is best when collecting website subdomains. collects as many subdomains as possible and stores subdomain history.

securitytrails collects information from DNS records, such as MX records, TXT records, name servers (NS), and other DNS records. and most importantly, it is the tool that most registers and stores the subdomains names of millions of websites.

subdomains are domain addresses in the same domain. for example the URL subdomain.example.com is a subdomain. Securitytrails tool is the best in the world at collecting website subdomain addresses.

In OSINT this serves to collect hidden information or information that is not intended to be shown to the public. The domain Google.com has more than 10k subdomains. It seems that these subdomains are related to DNS record verifications, Google services, Google cache and thousands of other things.

This tool is also very good at analyzing and storing the DNS record of internet domains. This tool also has a section to view the DNS history of any domain, this tool is similar to dns history.

The DNS records that you can see with this tool:

  • MX Records
  • nameservers
  • TXT Records
  • A Records
  • AAAA Records
  • SOA Records

This tool will show the current DNS records of the domain you are searching for. All of the above mentioned in the DNS history tool but here the current DNS records of the domain will be shown.

DNS records also, unlike the other tools, show other websites that use the domain that you analyzed in their DNS records. as in the MX record or nameservers.

  • CNAME Records pointed
  • MX records pointed
  • NS records pointed

This is useful when you search for Internet sites that have a relationship in their DNS records with the domain name that you analyzed in this tool. This is mostly useful when you are trying to find information about a person who owns a VPS (virtual private server).