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.

12 hosts · 314 ms

HostCertsFirst seenLast seenDNS
snu.edu.in 36 2025-11-03 2026-09-30 ok
*.snu.edu.in 36 2025-11-03 2026-09-30 —
beta2023.snu.edu.in 1 2025-11-10 2025-11-10 nodata
blackboard.snu.edu.in 2 2026-01-30 2026-07-17 ok
cdn.snu.edu.in 11 2026-05-26 2026-09-22 ok
snu-ace-applications.snu.edu.in 3 2026-04-20 2026-09-20 ok
ugapplications.snu.edu.in 1 2025-12-04 2025-12-04 ok
webapps.snu.edu.in 15 2026-04-12 2026-10-06 nodata
*.webapps.snu.edu.in 15 2026-04-12 2026-10-06 —
dev.webapps.snu.edu.in 1 2026-04-23 2026-04-23 nodata
*.dev.webapps.snu.edu.in 11 2026-04-23 2026-08-21 —
apply.snu.edu.in 1 2026-01-14 2026-01-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/snu.edu.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/snu.edu.in.