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.

6 hosts · 223 ms

HostCertsFirst seenLast seen
uniqlo.com.hk 2 2025-10-10 2026-09-09
*.uniqlo.com.hk 4 2025-07-01 2026-09-09
mta-sts.uniqlo.com.hk 1 2026-01-22 2026-01-22
m.e-news.uniqlo.com.hk 1 2025-11-18 2025-11-18
res.e-news.uniqlo.com.hk 1 2025-11-18 2025-11-18
t.e-news.uniqlo.com.hk 1 2025-11-18 2025-11-18

Programmatic access: API GET /v1/hosts/uniqlo.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/uniqlo.com.hk.