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.

21 hosts · 210 ms

HostCertsFirst seenLast seen
rasnsw.com.au 9 2026-04-21 2026-08-17
prod2.rasnsw.com.au 6 2026-05-03 2026-08-29
stage2.rasnsw.com.au 8 2026-05-05 2026-08-31
dev2.rasnsw.com.au 8 2026-05-02 2026-08-28
prod.rasnsw.com.au 8 2026-04-28 2026-08-24
heritage.rasnsw.com.au 1 2025-11-10 2025-11-10
stage.rasnsw.com.au 8 2026-04-29 2026-08-26
bmsone.rasnsw.com.au 2 2025-08-10 2026-07-28
auth.rasnsw.com.au 10 2026-04-23 2026-08-20
skydeck.rasnsw.com.au 3 2025-10-19 2025-10-19
mail.rasnsw.com.au 2 2025-08-10 2026-07-28
email.rasnsw.com.au 8 2026-05-02 2026-08-28
rascellar.rasnsw.com.au 8 2026-06-16 2026-08-24
www.rascellar.rasnsw.com.au 4 2026-06-25 2026-08-23
firepower.rasnsw.com.au 3 2025-08-13 2026-07-29
preferences.rasnsw.com.au 9 2026-05-27 2026-09-22
ag4schools.rasnsw.com.au 8 2026-07-21 2026-09-19
members.rasnsw.com.au 4 2026-04-24 2026-04-24
webuplift.rasnsw.com.au 13 2026-05-22 2026-09-18
dev.rasnsw.com.au 8 2026-04-29 2026-08-25
www.rasnsw.com.au 8 2026-04-28 2026-08-24

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