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.

5 hosts · 223 ms

HostCertsFirst seenLast seen
news.kbcbrussels.be 1 2025-12-08 2025-12-08
m.news.kbcbrussels.be 1 2025-12-08 2025-12-08
res.news.kbcbrussels.be 1 2025-12-08 2025-12-08
t.news.kbcbrussels.be 1 2025-12-08 2025-12-08
www.news.kbcbrussels.be 1 2025-12-08 2025-12-08

Programmatic access: API GET /v1/hosts/news.kbcbrussels.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/news.kbcbrussels.be.