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.

13 hosts · 289 ms

HostCertsFirst seenLast seenDNS
thebluespace.com.au 24 2026-05-06 2026-09-26 ok
*.thebluespace.com.au 9 2026-05-06 2026-09-04 —
media.thebluespace.com.au 10 2026-05-25 2026-09-24 ok
staging.thebluespace.com.au 11 2026-04-13 2026-09-25 ok
link.thebluespace.com.au 5 2026-05-21 2026-09-17 ok
draft-order-proto.thebluespace.com.au 2 2026-07-21 2026-07-21 ok
help.thebluespace.com.au 5 2026-04-21 2026-08-19 ok
cfjump.thebluespace.com.au 4 2026-04-19 2026-08-19 ok
ftp.thebluespace.com.au 1 2025-06-23 2025-06-23 ok
recommendations.thebluespace.com.au 2 2026-06-15 2026-06-15 ok
mta-sts.thebluespace.com.au 4 2026-05-06 2026-07-28 ok
account.thebluespace.com.au 15 2026-04-15 2026-09-26 ok
www.thebluespace.com.au 13 2026-05-16 2026-09-23 ok

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