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 · 165 ms

HostCertsFirst seenLast seen
cloud.email.narscosmetics.com.hk 1 2025-11-03 2025-11-03
image.email.narscosmetics.com.hk 2 2025-11-12 2026-01-08
click.email.narscosmetics.com.hk 1 2025-11-03 2025-11-03
view.email.narscosmetics.com.hk 1 2025-11-03 2025-11-03

Programmatic access: API GET /v1/hosts/email.narscosmetics.com.hk (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/email.narscosmetics.com.hk.