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.

10 hosts · 244 ms

HostCertsFirst seenLast seen
tscubic-travel.com 2 2025-10-06 2026-10-09
st2.tscubic-travel.com 2 2026-02-19 2026-02-19
st3.tscubic-travel.com 2 2026-02-19 2026-02-19
www.st-reserve.tscubic-travel.com 1 2025-11-10 2025-11-10
www.reserve.tscubic-travel.com 1 2025-11-10 2025-11-10
st.tscubic-travel.com 3 2025-09-29 2026-10-06
preview.tscubic-travel.com 2 2025-10-06 2026-10-09
st2-preview.tscubic-travel.com 2 2026-02-19 2026-02-19
st3-preview.tscubic-travel.com 2 2026-02-19 2026-02-19
st-preview.tscubic-travel.com 3 2025-09-29 2026-10-06

Programmatic access: API GET /v1/hosts/tscubic-travel.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/tscubic-travel.com.