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.

20 hosts · 253 ms

HostCertsFirst seenLast seen
spadoom.com 119 2026-04-14 2026-10-02
*.spadoom.com 16 2026-04-14 2026-09-26
ci.spadoom.com 8 2026-04-22 2026-08-18
api.spadoom.com 6 2026-06-02 2026-10-02
crm.spadoom.com 2 2026-08-23 2026-08-23
*.crm.spadoom.com 2 2026-08-23 2026-08-23
learn.spadoom.com 8 2026-07-18 2026-09-15
*.learn.spadoom.com 8 2026-07-18 2026-09-15
go.spadoom.com 13 2026-04-13 2026-10-08
projects.spadoom.com 10 2026-04-29 2026-08-25
*.projects.spadoom.com 10 2026-04-29 2026-08-25
assets.spadoom.com 8 2026-04-29 2026-08-25
mta-sts.spadoom.com 31 2026-05-06 2026-09-01
t.spadoom.com 1 2026-08-26 2026-08-26
orbit.spadoom.com 4 2026-05-08 2026-05-08
dev.spadoom.com 6 2026-04-22 2026-08-18
www.spadoom.com 10 2026-04-24 2026-08-20
mta-sts-policy.spadoom.com 8 2026-05-06 2026-09-01
dashboard.edubily.spadoom.com 12 2026-06-06 2026-10-02
*.dashboard.edubily.spadoom.com 12 2026-06-06 2026-10-02

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