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 · 288 ms

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

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