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.

17 hosts · 250 ms

HostCertsFirst seenLast seenDNS
contoureducation.com.au 12 2026-04-21 2026-08-27 ok
*.contoureducation.com.au 4 2026-04-21 2026-08-21 —
contour-api.contoureducation.com.au 3 2026-03-29 2026-08-29 ok
lms-api.contoureducation.com.au 5 2026-05-15 2026-09-12 ok
link.contoureducation.com.au 2 2026-09-01 2026-09-01 ok
www.link.contoureducation.com.au 2 2026-09-01 2026-09-01 ok
book.contoureducation.com.au 5 2026-05-04 2026-09-07 ok
lms-cdn.contoureducation.com.au 3 2025-06-11 2026-05-12 ok
learn.contoureducation.com.au 2 2026-05-05 2026-05-05 ok
testprep.contoureducation.com.au 5 2026-05-21 2026-09-21 ok
forms.contoureducation.com.au 4 2026-04-15 2026-08-13 ok
contour-crons.contoureducation.com.au 6 2026-06-01 2026-09-29 ok
tickets.contoureducation.com.au 6 2026-06-09 2026-10-05 ok
contoureducation.com.au.contoureducation.com.au 6 2026-06-02 2026-10-02 nodata
www.contoureducation.com.au.contoureducation.com.au 6 2026-06-02 2026-10-02 nodata
www.contoureducation.com.au 6 2026-05-01 2026-08-27 ok
survey.contoureducation.com.au 1 2026-08-25 2026-08-25 ok

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