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.

4 hosts · 311 ms

HostCertsFirst seenLast seen
vf.com 4 2025-10-10 2026-10-05
*.vf.com 4 2025-10-10 2026-10-05
links1.vf.com 4 2026-04-16 2026-08-14
links.vf.com 3 2026-04-14 2026-09-14

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