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.

9 hosts · 243 ms

HostCertsFirst seenLast seenDNS
melling.au 8 2026-05-09 2026-09-04 ok
sharemarketindexportfolioperformance.melling.au 18 2026-06-01 2026-09-28 ok
staff.melling.au 10 2026-05-09 2026-09-04 ok
join.melling.au 11 2026-05-27 2026-09-22 ok
sharemarketindexportfolios.melling.au 16 2026-05-30 2026-09-25 ok
members.melling.au 10 2026-05-09 2026-09-04 ok
mta-sts.melling.au 4 2026-05-04 2026-07-28 ok
appointment.melling.au 10 2026-05-09 2026-09-04 ok
www.melling.au 8 2026-05-09 2026-09-04 ok

Programmatic access, with DNS A records: API GET /v1/hosts/melling.au (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/melling.au.