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 · 266 ms

HostCertsFirst seenLast seen
gamerant.com 9 2026-05-11 2026-10-08
*.gamerant.com 19 2026-04-26 2026-10-08
t13.gamerant.com 4 2026-06-08 2026-10-09
sli.gamerant.com 1 2025-11-30 2025-11-30
click.newsletter.gamerant.com 2 2026-08-17 2026-08-17

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