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.

6 hosts · 427 ms

HostCertsFirst seenLast seenDNS
site-search.takarakuji-official.jp 3 2025-09-17 2026-09-25 ok
click.takarakuji-official.jp 3 2026-03-24 2026-09-14 ok
sp.takarakuji-official.jp 2 2026-01-20 2026-01-20 ok
analytics.takarakuji-official.jp 4 2026-04-20 2026-09-28 ok
www.takarakuji-official.jp 2 2026-01-20 2026-01-20 ok
sorry.takarakuji-official.jp 2 2025-08-04 2026-07-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/takarakuji-official.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/takarakuji-official.jp.