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.

14 hosts · 160 ms

HostCertsFirst seenLast seen
yamagatabank.co.jp 7 2025-06-18 2026-07-08
ib1.yamagatabank.co.jp 16 2025-08-07 2026-08-26
*.ib1.yamagatabank.co.jp 14 2026-04-20 2026-08-26
api1.yamagatabank.co.jp 2 2025-06-11 2026-06-12
www1.yamagatabank.co.jp 7 2025-06-18 2026-07-08
www2.yamagatabank.co.jp 2 2025-06-18 2026-07-08
form.yamagatabank.co.jp 2 2025-08-15 2026-09-04
www.form.yamagatabank.co.jp 2 2025-08-15 2026-09-04
map.yamagatabank.co.jp 2 2026-03-27 2026-10-02
ybft.yamagatabank.co.jp 1 2026-06-04 2026-06-04
api-test.yamagatabank.co.jp 1 2026-02-09 2026-02-09
apidev-test.yamagatabank.co.jp 1 2026-02-09 2026-02-09
apidev.yamagatabank.co.jp 3 2026-03-16 2026-08-16
www.yamagatabank.co.jp 7 2025-06-18 2026-07-08

Programmatic access: API GET /v1/hosts/yamagatabank.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/yamagatabank.co.jp.