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.

20 hosts · 236 ms

HostCertsFirst seenLast seenDNS
aozorabank.co.jp 4 2025-11-05 2026-01-22 ok
*.aozorabank.co.jp 1 2025-11-05 2025-11-05 —
www1.aozorabank.co.jp 10 2026-05-01 2026-09-28 ok
www.ib2.aozorabank.co.jp 2 2026-04-23 2026-09-06 ok
www2.aozorabank.co.jp 10 2026-04-22 2026-09-19 ok
ssc.aozorabank.co.jp 2 2026-04-09 2026-09-09 ok
edge-ai.aozorabank.co.jp 5 2026-04-18 2026-09-29 ok
dev-edge-ai.aozorabank.co.jp 3 2026-05-28 2026-09-10 ok
apl.aozorabank.co.jp 1 2026-01-19 2026-01-19 ok
ekyc.apl.aozorabank.co.jp 1 2026-01-19 2026-01-19 ok
stg.apl.aozorabank.co.jp 1 2026-01-19 2026-01-19 ok
adm.apl.aozorabank.co.jp 1 2026-01-19 2026-01-19 nxdomain
stg4adm.apl.aozorabank.co.jp 1 2026-01-19 2026-01-19 ok
spapp.aozorabank.co.jp 1 2026-05-15 2026-05-15 ok
faq.aozorabank.co.jp 3 2025-11-05 2026-10-06 ok
ccplus.aozorabank.co.jp 6 2026-04-16 2026-09-09 ok
apptst.aozorabank.co.jp 1 2026-04-09 2026-04-09 ok
mv.aozorabank.co.jp 5 2025-08-04 2026-07-31 ok
stg.mv.aozorabank.co.jp 5 2026-05-17 2026-09-14 ok
www.aozorabank.co.jp 3 2026-01-22 2026-01-22 ok

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