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.

4 hosts · 315 ms

HostCertsFirst seenLast seenDNS
bank.higashi-nipponbank.jp 1 2026-02-16 2026-02-16 ok
*.bank.higashi-nipponbank.jp 1 2026-02-16 2026-02-16 —
web.higashigpt.higashi-nipponbank.jp 4 2026-02-21 2026-10-05 ok
api.higashigpt.higashi-nipponbank.jp 3 2026-02-21 2026-10-05 ok

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