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.

8 hosts · 183 ms

HostCertsFirst seenLast seen
huswell.be 3 2026-04-23 2026-09-18
*.huswell.be 1 2025-10-06 2025-10-06
job.huswell.be 1 2026-04-17 2026-04-17
*.auth.huswell.be 1 2025-10-06 2025-10-06
*.demo.huswell.be 1 2025-10-06 2025-10-06
*.test.huswell.be 1 2025-10-06 2025-10-06
www.host.huswell.be 1 2025-10-06 2025-10-06
www.huswell.be 3 2026-04-23 2026-09-18

Programmatic access: API GET /v1/hosts/huswell.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/huswell.be.