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.

11 hosts · 280 ms

HostCertsFirst seenLast seenDNS
dance-masterclass.com 14 2026-04-19 2026-10-02 ok
*.dance-masterclass.com 8 2026-04-19 2026-10-02 —
cdn2.dance-masterclass.com 10 2026-04-20 2026-08-16 ok
catalogue.dance-masterclass.com 9 2026-05-21 2026-09-16 ok
email.kjbm.dance-masterclass.com 5 2026-04-26 2026-08-24 ok
cdn.dance-masterclass.com 10 2026-04-19 2026-08-15 ok
reels.dance-masterclass.com 9 2026-05-27 2026-09-22 ok
live-redirect.dance-masterclass.com 6 2026-06-25 2026-08-23 ok
*.live-redirect.dance-masterclass.com 6 2026-06-25 2026-08-23 —
sst.dance-masterclass.com 5 2026-05-24 2026-09-21 ok
www.dance-masterclass.com 6 2026-05-30 2026-09-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/dance-masterclass.com (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/dance-masterclass.com.