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.

12 hosts · 243 ms

HostCertsFirst seenLast seenDNS
tsubaki.com.au 3 2026-03-16 2026-09-24 ok
dev2.tsubaki.com.au 4 2026-05-05 2026-07-04 ok
loyaltyclub.tsubaki.com.au 4 2026-04-20 2026-08-20 ok
remote.tsubaki.com.au 1 2025-11-17 2025-11-17 ok
www.remote.tsubaki.com.au 1 2025-11-17 2025-11-17 nxdomain
ordering.tsubaki.com.au 1 2026-05-25 2026-05-25 ok
www.ordering.tsubaki.com.au 1 2026-05-25 2026-05-25 nxdomain
bi.tsubaki.com.au 1 2025-11-16 2025-11-16 ok
www.bi.tsubaki.com.au 1 2025-11-16 2025-11-16 nxdomain
mta-sts.tsubaki.com.au 5 2026-05-05 2026-09-02 ok
www.mta-sts.tsubaki.com.au 5 2026-05-05 2026-09-02 ok
www.tsubaki.com.au 3 2026-03-16 2026-09-24 ok

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