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.

5 hosts · 184 ms

HostCertsFirst seenLast seen
zota.sg 15 2026-04-27 2026-09-13
*.zota.sg 10 2026-05-18 2026-09-13
staging2.zota.sg 1 2026-08-12 2026-08-12
info.zota.sg 9 2026-04-12 2026-09-09
www.zota.sg 5 2026-04-27 2026-08-25

Programmatic access: API GET /v1/hosts/zota.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/zota.sg.