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.

8 hosts · 285 ms

HostCertsFirst seenLast seenDNS
tenshoku.nurse-senka.com 4 2026-02-24 2026-07-27 ok
*.tenshoku.nurse-senka.com 4 2026-02-24 2026-07-27 —
edge.tenshoku.nurse-senka.com 2 2026-03-03 2026-08-03 nodata
*.edge.tenshoku.nurse-senka.com 2 2026-03-03 2026-08-03 —
sgtm.tenshoku.nurse-senka.com 4 2026-06-12 2026-09-29 ok
development.tenshoku.nurse-senka.com 5 2026-02-24 2026-07-27 ok
*.development.tenshoku.nurse-senka.com 4 2026-02-24 2026-07-27 —
sgtm.development.tenshoku.nurse-senka.com 3 2026-05-07 2026-08-22 ok

Programmatic access, with DNS A records: API GET /v1/hosts/tenshoku.nurse-senka.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/tenshoku.nurse-senka.com.