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 · 311 ms

HostCertsFirst seenLast seenDNS
m1.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
res1.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
t1.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
m2.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
res2.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
t2.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
m3.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
res3.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
t3.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
m.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
res.alerts.kotak.in 4 2025-06-15 2026-08-10 ok
t.alerts.kotak.in 5 2025-06-15 2026-08-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/alerts.kotak.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/alerts.kotak.in.