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.

4 hosts · 285 ms

HostCertsFirst seenLast seen
cervistech.com 39 2025-07-30 2026-09-27
*.cervistech.com 6 2025-08-31 2026-08-25
payment.cervistech.com 7 2026-05-19 2026-09-14
support.cervistech.com 4 2026-06-10 2026-10-08

Programmatic access: API GET /v1/hosts/cervistech.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/cervistech.com.