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 · 270 ms

HostCertsFirst seenLast seen
apify.net 3 2025-09-18 2026-08-18
*.apify.net 3 2025-09-18 2026-08-18
*.runs.apify.net 3 2025-09-18 2026-08-18
*.runs-securitybyobscurity.apify.net 3 2025-09-18 2026-08-18

Programmatic access: API GET /v1/hosts/apify.net (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/apify.net.