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 · 332 ms

HostCertsFirst seenLast seen
paaniproject.org 32 2026-04-13 2026-10-08
*.paaniproject.org 12 2026-04-13 2026-10-08
config.paaniproject.org 11 2026-06-09 2026-10-05
*.config.paaniproject.org 11 2026-06-09 2026-10-05
portal.paaniproject.org 2 2026-05-16 2026-09-29
www.paaniproject.org 10 2026-04-17 2026-08-13

Programmatic access: API GET /v1/hosts/paaniproject.org (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/paaniproject.org.