#1 subdomain reconnaissance tool

Subdomains Finder.com

Map any domain's attack surface in seconds: subdomains, IPs, ASN, open ports, and CVEs.

Enter a root domain to discover all subdomains

Authorized assessment only. We log your IP address with each lookup, see acceptable use.

subdomain discovery · ip & asn · port detection · cve mapping

Explore Domains

Most Subdomains

View all
uscc.net
980,770 subs
army.mil
919,479 subs
plus.pl
877,947 subs
orange.pl
872,512 subs
att.net
844,844 subs
telecomitalia.it
802,383 subs
swisscom.ch
681,107 subs
singnet.com.sg
616,429 subs

Recently Scanned

View all
w1vip.fun
15 subsJust now
srtb.bj
23 subs8m ago
techysudip.com
34 subs29m ago
vvipbx.com
173 subs32m ago
itsporo.work
11 subs35m ago
cloud.com
3,774 subs36m ago
nayantelecomltd.net
8 subs39m ago
sekerbank.com.tr
155 subs42m ago

Hall of Fame

View all
sscict.nl
10/10
routz.nl
10/10
base27.eu
10/10
ecourtdate.com
10/10
survicate.com
10/10
frisbeesbp.ru
10/10
hackerone.com
10/10
cloudflare.com
10/10
Browse all scanned domains

The #1 Subdomain Finder: Discover Every Subdomain of Any Domain

SubDomains Finder is the #1 free online subdomain finder and scanner. Enter any root domain and our subdomain enumeration tool instantly returns every known subdomain, its IP addresses, open ports, ASN provider, and hosting infrastructure. No installation, no API key, and no command line required.

How the subdomain finder works

  1. Enter a root domain (e.g. example.com)
  2. We query Certificate Transparency logs, passive DNS databases, and public internet scan data
  3. Results are returned instantly, no active probes sent to the target

Who uses this subdomain scanner

  • Penetration testers during recon phase
  • Bug bounty hunters mapping attack surface
  • Blue teams auditing their own exposure
  • Sysadmins tracking shadow IT assets

What you get per subdomain

  • IPv4 / IPv6 addresses
  • Open ports and detected services
  • ASN & hosting provider
  • Country & CDN/WAF detection

Unlike CLI tools like Subfinder or Amass that require installation, SubDomainsFinder.com is a fully browser-based subdomain enumeration tool. Paste a domain and get results in seconds. Compare all subdomain enumeration tools →