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.

4 hosts · 175 ms

HostCertsFirst seenLast seen
mariobadescu.com 32 2026-02-11 2026-10-08
*.mariobadescu.com 16 2026-02-11 2026-10-08
account.mariobadescu.com 9 2026-04-27 2026-09-06
www.mariobadescu.com 15 2026-04-14 2026-09-26

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