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.

5 hosts · 212 ms

HostCertsFirst seenLast seenDNS
img.mail.kotak.in 1 2025-12-23 2025-12-23 nxdomain
www.img.mail.kotak.in 1 2025-12-23 2025-12-23 nxdomain
lnk.mail.kotak.in 3 2025-10-18 2026-09-18 ok
www.lnk.mail.kotak.in 1 2025-12-15 2025-12-15 nxdomain
delivery.mail.kotak.in 4 2026-05-29 2026-09-17 ok

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