Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

10 hosts · 213 ms

HostCertsFirst seenLast seenDNS
porter.ae 9 2026-02-12 2026-08-20 ok
*.porter.ae 12 2026-02-12 2026-08-20 —
prod.porter.ae 7 2025-07-29 2026-08-20 nodata
*.prod.porter.ae 7 2025-07-29 2026-08-20 —
muneemji-ktor-external.prod.porter.ae 3 2026-05-07 2026-08-22 ok
staging.porter.ae 7 2025-07-29 2026-07-23 nodata
*.staging.porter.ae 10 2025-07-29 2026-08-17 —
prod-internal.porter.ae 3 2026-05-10 2026-08-23 nodata
*.prod-internal.porter.ae 8 2026-04-26 2026-10-05 —
*.staging-internal.porter.ae 3 2026-05-19 2026-09-01 —

Programmatic access, with DNS A records: API GET /v1/hosts/porter.ae (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/porter.ae.