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.

9 hosts · 189 ms

HostCertsFirst seenLast seen
pro-gfx.de 4 2026-04-18 2026-08-16
pf.pro-gfx.de 1 2026-09-09 2026-09-09
docs.pro-gfx.de 5 2026-04-22 2026-08-20
ai.docs.pro-gfx.de 5 2026-04-22 2026-08-20
int.pro-gfx.de 5 2026-05-11 2026-09-08
vault-mcp.int.pro-gfx.de 4 2026-05-18 2026-05-18
vault.int.pro-gfx.de 5 2026-05-18 2026-09-15
dev.pro-gfx.de 5 2026-05-11 2026-09-08
www.pro-gfx.de 4 2026-04-18 2026-08-16

Programmatic access: API GET /v1/hosts/pro-gfx.de (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/pro-gfx.de.