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 · 229 ms

HostCertsFirst seenLast seenDNS
dmkt-lm.jp 1 2026-05-08 2026-05-08 nodata
*.dmkt-lm.jp 2 2025-12-23 2026-05-08 —
*.download.dmkt-lm.jp 1 2026-02-03 2026-02-03 —
stg.download.dmkt-lm.jp 10 2025-07-31 2026-08-20 ok
ft.download.dmkt-lm.jp 10 2025-07-31 2026-08-20 ok
dev.download.dmkt-lm.jp 10 2025-07-31 2026-08-20 ok
www.download.dmkt-lm.jp 10 2025-07-31 2026-08-20 ok

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