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.

8 hosts · 196 ms

HostCertsFirst seenLast seen
*.bb.excite.co.jp 4 2025-11-05 2026-10-06
vpn-gw2.bb.excite.co.jp 5 2026-05-07 2026-09-04
wp-bb-media.bb.excite.co.jp 9 2026-06-07 2026-10-04
*.wp-bb-media.bb.excite.co.jp 9 2026-06-07 2026-10-04
wp-bb-simguide.bb.excite.co.jp 16 2026-05-21 2026-09-16
*.wp-bb-simguide.bb.excite.co.jp 16 2026-05-21 2026-09-16
auth.bb.excite.co.jp 8 2026-04-19 2026-08-16
auth-admin.bb.excite.co.jp 8 2026-04-20 2026-08-16

Programmatic access: API GET /v1/hosts/bb.excite.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/bb.excite.co.jp.