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.

7 hosts · 166 ms

HostCertsFirst seenLast seen
partos.ai 23 2025-08-23 2026-09-29
*.partos.ai 24 2025-08-23 2026-09-29
status.partos.ai 4 2026-04-30 2026-06-29
trust.partos.ai 10 2026-04-29 2026-08-25
gov.partos.ai 19 2025-11-06 2026-09-25
*.gov.partos.ai 19 2025-11-06 2026-09-25
verify.gov.partos.ai 3 2026-03-27 2026-08-27

Programmatic access: API GET /v1/hosts/partos.ai (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/partos.ai.