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.

5 hosts · 270 ms

HostCertsFirst seenLast seenDNS
emmyonline.tv 5 2026-05-16 2026-09-29 ok
cal.emmyonline.tv 2 2026-03-24 2026-08-24 ok
shop.emmyonline.tv 17 2026-04-19 2026-10-01 ok
hq.emmyonline.tv 2 2026-04-23 2026-04-23 nxdomain
www.emmyonline.tv 3 2026-05-30 2026-08-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/emmyonline.tv (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/emmyonline.tv.