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.

9 hosts · 228 ms

HostCertsFirst seenLast seenDNS
jsports.co.jp 5 2025-08-07 2026-09-10 nodata
*.jsports.co.jp 4 2025-08-07 2026-08-17 —
id.jsports.co.jp 2 2025-08-19 2026-09-10 ok
jod.jsports.co.jp 2 2025-08-19 2026-09-10 ok
store.jsports.co.jp 2 2025-06-27 2026-07-07 ok
*.in.jsports.co.jp 5 2025-08-04 2026-08-22 —
jod-primary.in.jsports.co.jp 4 2025-08-18 2026-08-25 ok
news.jsports.co.jp 2 2025-08-19 2026-09-10 ok
www.jsports.co.jp 2 2025-08-19 2026-09-10 ok

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