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.

31 hosts · 277 ms

HostCertsFirst seenLast seenDNS
nurse-senka.jp 10 2025-11-30 2026-09-28 ok
*.nurse-senka.jp 8 2025-11-30 2026-09-28 —
media.nurse-senka.jp 5 2026-05-17 2026-08-24 ok
tmp-media.nurse-senka.jp 2 2026-08-03 2026-08-03 ok
tmpp-media.nurse-senka.jp 1 2026-08-03 2026-08-03 nxdomain
job.nurse-senka.jp 2 2025-07-11 2026-06-11 nodata
auth-e2e.nurse-senka.jp 5 2026-05-10 2026-09-10 ok
knowledge.nurse-senka.jp 2 2026-08-03 2026-08-24 ok
tmp-knowledge.nurse-senka.jp 1 2026-08-04 2026-08-04 ok
lounge.nurse-senka.jp 2 2026-08-24 2026-08-24 ok
tmp-lounge.nurse-senka.jp 2 2026-08-03 2026-08-03 ok
tmpp-lounge.nurse-senka.jp 1 2026-08-03 2026-08-03 nxdomain
square.nurse-senka.jp 2 2026-08-03 2026-08-24 ok
tmp-square.nurse-senka.jp 1 2026-08-04 2026-08-04 ok
medical-term.nurse-senka.jp 2 2026-08-03 2026-08-24 ok
tmp-medical-term.nurse-senka.jp 1 2026-08-04 2026-08-04 ok
promo.nurse-senka.jp 1 2026-08-24 2026-08-24 ok
tmp-promo.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-media.development.nurse-senka.jp 2 2026-08-03 2026-08-12 ok
redirectt-media.development.nurse-senka.jp 2 2026-08-12 2026-08-12 nxdomain
redirect-knowledge.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-lounge.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-square.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-medical-term.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-promo.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-account.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
redirect-survey.development.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
account.nurse-senka.jp 5 2026-05-22 2026-08-24 ok
tmp-account.nurse-senka.jp 1 2026-08-03 2026-08-03 ok
survey.nurse-senka.jp 2 2026-08-24 2026-08-24 ok
tmp-survey.nurse-senka.jp 1 2026-08-03 2026-08-03 ok

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