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.

11 hosts · 256 ms

HostCertsFirst seenLast seenDNS
himegin.co.jp 1 2025-07-23 2025-07-23 ok
www.bk.loan-pf.himegin.co.jp 2 2025-09-08 2026-09-10 ok
www.loan-pf.himegin.co.jp 2 2025-09-08 2026-09-10 ok
www.api.himegin.co.jp 2 2026-04-03 2026-09-03 nodata
www.biz-portal.himegin.co.jp 1 2025-10-07 2025-10-07 ok
form.himegin.co.jp 2 2025-09-22 2026-09-30 ok
www.himewrap.himegin.co.jp 3 2026-05-01 2026-10-01 ok
sms.himegin.co.jp 1 2025-12-26 2025-12-26 nodata
api-gw.himegin.co.jp 2 2026-02-24 2026-02-24 ok
fapi-gw.himegin.co.jp 4 2025-12-29 2026-08-28 ok
www.himegin.co.jp 3 2025-07-23 2026-07-09 ok

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