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.

18 hosts · 358 ms

HostCertsFirst seenLast seenDNS
matbao.com 3 2025-08-21 2026-01-06 ok
*.matbao.com 5 2025-08-21 2026-10-03 —
sa.matbao.com 5 2026-06-01 2026-09-21 ok
rbac-beta.matbao.com 4 2026-06-08 2026-10-06 ok
job.matbao.com 5 2026-05-07 2026-09-04 ok
runclub.matbao.com 4 2026-05-20 2026-10-06 ok
www.runclub.matbao.com 4 2026-05-20 2026-10-06 ok
tech.matbao.com 4 2026-04-10 2026-08-28 ok
www.tech.matbao.com 4 2026-04-10 2026-08-28 ok
tool-fi.matbao.com 5 2026-05-25 2026-09-23 ok
glpi.matbao.com 5 2026-05-24 2026-09-21 ok
workflows-in.matbao.com 5 2026-05-12 2026-09-09 ok
run.matbao.com 4 2026-05-21 2026-07-30 ok
www.run.matbao.com 4 2026-05-21 2026-07-30 ok
workflows-pro.matbao.com 4 2026-04-22 2026-06-21 ok
op.matbao.com 5 2026-06-01 2026-09-21 ok
sp.matbao.com 5 2026-06-01 2026-09-21 ok
bz.matbao.com 5 2026-06-01 2026-09-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/matbao.com (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/matbao.com.