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.

5 hosts · 227 ms

HostCertsFirst seenLast seenDNS
fmgengineering.com.au 6 2026-04-24 2026-08-22 ok
*.fmgengineering.com.au 1 2026-04-26 2026-04-26 —
api.fmgengineering.com.au 6 2026-04-14 2026-09-26 ok
scim.fmgengineering.com.au 11 2026-04-25 2026-10-02 ok
www.fmgengineering.com.au 5 2026-04-24 2026-08-22 ok

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