Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

10 hosts · 240 ms

HostCertsFirst seenLast seen
oshacademy-atp.com 3 2026-04-03 2026-09-21
*.oshacademy-atp.com 2 2026-04-03 2026-09-21
staging7.oshacademy-atp.com 1 2026-09-21 2026-09-21
app.oshacademy-atp.com 3 2026-09-21 2026-09-21
dev2204.app.oshacademy-atp.com 3 2026-10-01 2026-10-01
dev2404.app.oshacademy-atp.com 3 2026-10-01 2026-10-01
staging7.app.oshacademy-atp.com 1 2026-09-21 2026-09-21
hq.app.oshacademy-atp.com 3 2026-06-26 2026-08-24
dev.app.oshacademy-atp.com 5 2026-04-16 2026-08-12
www.oshacademy-atp.com 1 2026-09-21 2026-09-21

Programmatic access: API GET /v1/hosts/oshacademy-atp.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/oshacademy-atp.com.