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.

7 hosts · 206 ms

HostCertsFirst seenLast seenDNS
theporter.in 12 2025-07-29 2026-09-21 ok
*.theporter.in 6 2025-07-29 2026-08-24 —
ondc.theporter.in 4 2025-07-29 2026-07-30 ok
*.ondc.theporter.in 4 2025-07-29 2026-07-30 —
tracking.theporter.in 5 2026-04-23 2026-09-21 ok
blog.theporter.in 1 2025-09-17 2025-09-17 nxdomain
www.theporter.in 6 2026-02-16 2026-09-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/theporter.in (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/theporter.in.