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 · 244 ms

HostCertsFirst seenLast seenDNS
saikyobank.co.jp 17 2025-12-10 2026-10-06 ok
loan-ekyc.saikyobank.co.jp 1 2026-02-03 2026-02-03 ok
www.loan-ekyc.saikyobank.co.jp 1 2026-02-03 2026-02-03 nxdomain
loan.saikyobank.co.jp 1 2026-02-03 2026-02-03 ok
www.loan.saikyobank.co.jp 1 2026-02-03 2026-02-03 nxdomain
loan-st.saikyobank.co.jp 1 2026-04-07 2026-04-07 ok
www.loan-st.saikyobank.co.jp 1 2026-04-07 2026-04-07 nxdomain
www.saikyobank.co.jp 17 2025-12-10 2026-10-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/saikyobank.co.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/saikyobank.co.jp.