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.

8 hosts · 313 ms

HostCertsFirst seenLast seenDNS
omakaseje.com 13 2026-04-22 2026-09-16 ok
staging01.omakaseje.com 1 2026-06-23 2026-06-23 ok
dev01.omakaseje.com 1 2026-06-24 2026-06-24 ok
stage.omakaseje.com 5 2026-04-26 2026-08-24 ok
release.omakaseje.com 1 2026-06-25 2026-06-25 ok
demo.omakaseje.com 5 2026-04-26 2026-08-24 ok
dev.omakaseje.com 5 2026-04-25 2026-08-24 ok
www.omakaseje.com 3 2026-04-22 2026-07-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/omakaseje.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/omakaseje.com.