Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

8 hosts · 188 ms

HostCertsFirst seenLast seen
spotlight.com.au 5 2025-08-01 2026-08-17
*.spotlight.com.au 5 2025-08-01 2026-08-17
hybrid.spotlight.com.au 2 2025-08-26 2026-09-15
srg.spotlight.com.au 3 2025-08-10 2026-07-11
cloud.email.spotlight.com.au 1 2025-11-05 2025-11-05
image.email.spotlight.com.au 2 2025-07-29 2025-08-16
m.spotlight.com.au 2 2025-07-03 2026-06-03
autodiscover.spotlight.com.au 2 2025-08-26 2026-09-15

Programmatic access: API GET /v1/hosts/spotlight.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/spotlight.com.au.