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 · 328 ms

HostCertsFirst seenLast seenDNS
bordo.com.au 50 2025-11-25 2026-10-06 ok
*.bordo.com.au 38 2025-11-25 2026-10-05 —
astaro1.bordo.com.au 8 2026-05-19 2026-07-19 ok
sapphire.bordo.com.au 14 2026-04-27 2026-07-27 ok
link.bordo.com.au 5 2026-05-21 2026-09-18 ok
internal.bordo.com.au 4 2026-05-01 2026-06-30 ok
mail.bordo.com.au 3 2026-04-11 2026-06-10 ok
backupip.bordo.com.au 4 2026-04-25 2026-06-24 ok
sapphiredr.bordo.com.au 4 2026-05-16 2026-07-16 ok
backupipdr.bordo.com.au 4 2026-04-26 2026-06-25 ok
server.bordo.com.au 2 2025-09-02 2026-08-03 ok
cameras.bordo.com.au 2 2026-06-08 2026-06-08 ok
mta-sts.bordo.com.au 8 2026-06-10 2026-10-06 ok
*.mta-sts.bordo.com.au 8 2026-06-10 2026-10-06 —
tsplus.bordo.com.au 17 2026-04-26 2026-09-11 ok
www.bordo.com.au 4 2026-06-06 2026-10-06 ok
synology.bordo.com.au 6 2026-06-07 2026-09-15 ok

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