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.

16 hosts · 424 ms

HostCertsFirst seenLast seenDNS
mercuryit.com.au 35 2025-07-31 2026-10-04 ok
*.mercuryit.com.au 23 2025-07-31 2026-10-04 —
sbc.mercuryit.com.au 2 2025-11-12 2026-01-21 ok
www.sbc.mercuryit.com.au 2 2025-11-12 2026-01-21 nxdomain
soc.mercuryit.com.au 5 2026-04-22 2026-09-22 ok
helm.mercuryit.com.au 1 2026-09-04 2026-09-04 ok
crm.mercuryit.com.au 2 2026-08-26 2026-08-26 ok
roadmapper.mercuryit.com.au 3 2025-11-18 2026-08-07 ok
*.roadmapper.mercuryit.com.au 1 2025-11-18 2025-11-18 —
forms.mercuryit.com.au 2 2026-09-01 2026-09-01 ok
*.forms.mercuryit.com.au 2 2026-09-01 2026-09-01 —
solutions.mercuryit.com.au 10 2026-05-16 2026-09-11 ok
secops.mercuryit.com.au 10 2026-04-22 2026-09-22 ok
mta-sts.mercuryit.com.au 7 2026-06-03 2026-10-01 ok
www.mercuryit.com.au 8 2026-06-05 2026-09-30 ok
*.www.mercuryit.com.au 2 2026-09-30 2026-09-30 —

Programmatic access, with DNS A records: API GET /v1/hosts/mercuryit.com.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/mercuryit.com.au.