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.

7 hosts · 290 ms

HostCertsFirst seenLast seenDNS
gmo-sol.jp 1 2026-03-30 2026-03-30 ok
*.gmo-sol.jp 3 2025-10-09 2026-09-08 —
gsolvpn.gmo-sol.jp 1 2025-10-30 2025-10-30 ok
orders.gmo-sol.jp 2 2025-11-14 2026-01-21 ok
stg-orders.gmo-sol.jp 2 2026-03-08 2026-07-24 ok
testorders.gmo-sol.jp 2 2025-07-12 2026-06-11 ok
www.gmo-sol.jp 1 2026-03-30 2026-03-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gmo-sol.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/gmo-sol.jp.