Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

4 hosts · 319 ms

HostCertsFirst seenLast seenDNS
zeliatech.com 9 2025-09-09 2026-09-07 ok
*.zeliatech.com 9 2025-09-09 2026-09-07 —
sgtm.zeliatech.com 5 2026-05-06 2026-09-03 ok
autodiscover.zeliatech.com 2 2026-01-16 2026-01-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/zeliatech.com (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/zeliatech.com.