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.

6 hosts · 277 ms

HostCertsFirst seenLast seen
gretalion.com 21 2026-04-16 2026-09-28
*.gretalion.com 7 2026-05-27 2026-09-24
brandbook.gretalion.com 1 2026-09-23 2026-09-23
returns.gretalion.com 8 2026-05-05 2026-08-31
paysera-pos.gretalion.com 1 2026-08-31 2026-08-31
www.gretalion.com 15 2026-04-16 2026-09-27

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