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.

7 hosts · 249 ms

HostCertsFirst seenLast seen
ewtc.de 2 2025-09-25 2026-01-19
*.ewtc.de 2 2025-09-25 2026-01-19
data1.ewtc.de 5 2026-05-11 2026-09-08
relaunch2025.ewtc.de 5 2026-05-18 2026-09-15
cdn.ewtc.de 11 2026-04-18 2026-09-30
kreuzfahrten.ewtc.de 5 2026-05-24 2026-09-21
newsletter.ewtc.de 4 2026-05-14 2026-07-29

Programmatic access: API GET /v1/hosts/ewtc.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/ewtc.de.