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Security

Subdomain Finder

Enter a domain, then list host names already published in certificate transparency logs. Each name is resolved to a public IPv4 address and marked when that address is on Cloudflare. The scan is not stored.

DNS

Published names

Read host names from certificate transparency instead of guessing a word list.

Address and country

Resolve each name to a public IPv4 address and show the country of the most common address.

Cloudflare

An orange cloud means the address is in Cloudflare’s published ranges. Copy, CSV, and JSON export the table.

Input

Enter a domain, then list published host names, public addresses, and Cloudflare matches.

Enter a domain to list host names already published in certificate transparency logs. Each name is resolved to a public IPv4 address and checked against Cloudflare’s address ranges.