subdomain . hostcloud.ie

The Subdomain Finder

Find Subdomains

Enter a domain and we’ll search certificate transparency logs, passive DNS, and common subdomain names.

How it works

  1. Enter a domain (for example example.com).
  2. We query certificate transparency logs for hostnames seen on SSL certificates.
  3. Passive DNS and a list of common subdomain names are checked in parallel.
  4. Each hostname is resolved to its IP address or CNAME where possible.