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.

15 hosts · 371 ms

HostCertsFirst seenLast seenDNS
holded.com 56 2025-11-11 2026-10-03 ok
*.holded.com 49 2025-11-11 2026-10-03 —
argocd.holded.com 4 2026-04-17 2026-09-26 ok
email.send.holded.com 3 2026-07-27 2026-09-25 ok
training.holded.com 10 2026-06-01 2026-09-27 ok
blog.holded.com 5 2026-04-16 2026-08-12 ok
feedback.holded.com 4 2026-06-22 2026-08-30 ok
ask.holded.com 5 2026-05-20 2026-09-17 ok
email.mail.holded.com 4 2026-04-11 2026-08-09 ok
cdn.holded.com 3 2026-05-20 2026-09-05 ok
jobs.holded.com 5 2026-05-29 2026-09-26 ok
atlantis.holded.com 5 2026-04-23 2026-09-30 ok
developers.holded.com 4 2026-04-26 2026-04-26 ok
get.holded.com 8 2026-04-24 2026-08-19 ok
www.holded.com 5 2026-05-19 2026-09-21 ok

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