DNS research

Subdomain history

Explore discovered subdomains, their DNS records, and the TLS certificates they presented. Snapshot comparisons show when records changed.

Find a domain

Enter a domain to start searching.

Latest snapshot

Current DNS records and TLS certificate details for subdomains
Full name	A / AAAA	CNAME	TXT	SSL / Certificate type	Valid until

Snapshot comparison

Each row compares two consecutive scans.

Filter history

Added and removed subdomains, and DNS and SSL changes between scans
When, UTC	Subdomain	What changed