Find every subdomain
of a domain.

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

3 hosts · 287 ms

HostCertsFirst seenLast seen
immigrationlaw.com 16 2026-04-28 2026-09-11
*.immigrationlaw.com 11 2026-05-05 2026-08-31
www.immigrationlaw.com 5 2026-04-28 2026-09-11

Programmatic access: API GET /v1/hosts/immigrationlaw.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/immigrationlaw.com.