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.

12 hosts · 232 ms

HostCertsFirst seenLast seen
oshacademy.com 10 2026-04-16 2026-08-15
*.oshacademy.com 2 2026-08-15 2026-08-15
staging23.oshacademy.com 5 2026-05-13 2026-09-10
testing24.oshacademy.com 5 2026-04-23 2026-08-21
testing26.oshacademy.com 5 2026-04-23 2026-08-21
store.oshacademy.com 15 2026-04-13 2026-09-24
staging23-api.oshacademy.com 3 2026-07-28 2026-09-26
staging26.api.oshacademy.com 3 2026-06-29 2026-08-28
comm.oshacademy.com 5 2026-05-27 2026-09-22
admin.oshacademy.com 5 2026-05-14 2026-09-11
cron.oshacademy.com 5 2026-05-20 2026-09-17
www.oshacademy.com 8 2026-04-16 2026-08-14

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