Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

6 hosts · 227 ms

HostCertsFirst seenLast seen
urlsh.hibikisk.jp 4 2026-01-27 2026-09-11
internetshinsei.hibikisk.jp 1 2026-07-16 2026-07-16
azukarikanri.hibikisk.jp 1 2026-07-17 2026-07-17
fl.hibikisk.jp 1 2025-10-17 2025-10-17
eigyoushien.hibikisk.jp 2 2026-08-12 2026-08-12
urls.hibikisk.jp 2 2026-04-15 2026-08-07

Programmatic access: API GET /v1/hosts/hibikisk.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/hibikisk.jp.