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.

8 hosts · 275 ms

HostCertsFirst seenLast seen
newbalance.com.sg 21 2025-10-13 2026-09-16
staging.newbalance.com.sg 14 2026-05-30 2026-09-25
link.email.newbalance.com.sg 16 2026-05-22 2026-09-30
stores.newbalance.com.sg 6 2026-04-18 2026-08-15
development.newbalance.com.sg 29 2025-07-24 2026-09-26
test.newbalance.com.sg 10 2026-04-24 2026-08-21
staging-test.newbalance.com.sg 10 2026-04-25 2026-08-21
www.newbalance.com.sg 14 2025-10-13 2026-09-16

Programmatic access: API GET /v1/hosts/newbalance.com.sg (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.sg.