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.

16 hosts · 309 ms

HostCertsFirst seenLast seenDNS
kickbox.com 20 2026-04-18 2026-09-04 ok
*.kickbox.com 16 2025-09-30 2026-09-04 —
read.kickbox.com 2 2026-10-01 2026-10-01 ok
knowledge.kickbox.com 15 2026-09-24 2026-10-07 ok
score.kickbox.com 2 2026-06-05 2026-06-05 ok
archive.kickbox.com 2 2026-10-04 2026-10-04 ok
blog.kickbox.com 7 2026-06-19 2026-09-27 ok
api.kickbox.com 1 2025-07-17 2025-07-17 ok
click.kickbox.com 1 2026-09-24 2026-09-24 ok
open.kickbox.com 2 2025-07-28 2026-08-20 ok
help.kickbox.com 8 2026-05-18 2026-09-13 ok
docs.kickbox.com 10 2026-05-07 2026-09-03 ok
status.kickbox.com 5 2026-05-08 2026-09-04 ok
support.kickbox.com 2 2026-08-31 2026-08-31 ok
trust.kickbox.com 10 2026-04-25 2026-08-22 ok
*.eu.kickbox.com 1 2026-01-17 2026-01-17 —

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