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.

4 hosts · 239 ms

HostCertsFirst seenLast seenDNS
perlasgo.lt 19 2026-01-13 2026-09-23 ok
*.perlasgo.lt 13 2026-01-13 2026-09-23 —
measure.perlasgo.lt 5 2026-05-30 2026-09-27 ok
www.perlasgo.lt 6 2026-04-27 2026-08-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/perlasgo.lt (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/perlasgo.lt.