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 · 293 ms

HostCertsFirst seenLast seen
starsport.be 5 2026-04-27 2026-09-27
*.starsport.be 5 2026-04-27 2026-09-27
stg.starsport.be 7 2026-04-27 2026-09-27
*.stg.starsport.be 5 2026-04-27 2026-09-27
auth.stg.starsport.be 4 2026-09-30 2026-09-30
auth.starsport.be 4 2026-10-01 2026-10-01
ppr.starsport.be 5 2026-04-27 2026-09-27
dev.starsport.be 5 2026-04-27 2026-09-27
*.dev.starsport.be 5 2026-04-27 2026-09-27
auth.dev.starsport.be 2 2026-09-02 2026-09-02

Programmatic access: API GET /v1/hosts/starsport.be (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/starsport.be.