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.

11 hosts · 266 ms

HostCertsFirst seenLast seen
newbalance.com.hk 19 2025-10-13 2026-09-16
roadtonyc2018.newbalance.com.hk 4 2026-04-30 2026-09-15
www.roadtonyc2018.newbalance.com.hk 4 2026-04-30 2026-09-15
runnyc2019.newbalance.com.hk 3 2026-05-27 2026-08-04
www.runnyc2019.newbalance.com.hk 3 2026-05-27 2026-08-04
staging.newbalance.com.hk 20 2026-05-31 2026-09-27
link.email.newbalance.com.hk 13 2026-05-22 2026-10-06
development.newbalance.com.hk 19 2025-07-24 2026-08-25
test.newbalance.com.hk 11 2026-04-25 2026-08-22
staging-test.newbalance.com.hk 10 2026-04-25 2026-08-21
www.newbalance.com.hk 18 2025-10-13 2026-09-16

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