Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

12 hosts · 380 ms

HostCertsFirst seenLast seenDNS
link.com 37 2026-03-12 2026-10-06 ok
*.link.com 37 2026-03-12 2026-10-06 —
clicks.e.link.com 18 2026-05-06 2026-09-24 ok
clicks.research.link.com 9 2026-05-06 2026-09-04 ok
e.email.link.com 18 2026-05-14 2026-09-24 ok
*.fastly.cdn.link.com 37 2026-03-12 2026-10-06 —
statics.link.com 14 2026-04-08 2026-09-30 ok
qa-statics.link.com 10 2026-03-10 2026-09-30 nxdomain
preprod-statics.link.com 13 2026-04-08 2026-09-25 nxdomain
edge-statics.link.com 14 2026-04-08 2026-09-30 ok
docs.link.com 2 2026-09-30 2026-09-30 nxdomain
qa-docs.link.com 2 2026-09-30 2026-09-30 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/link.com (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/link.com.