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 · 256 ms

HostCertsFirst seenLast seenDNS
cloud.klm-mail.com 4 2026-03-17 2026-08-24 ok
image.klm-mail.com 4 2026-02-16 2026-10-05 ok
click.klm-mail.com 4 2025-07-09 2026-08-25 ok
pages.klm-mail.com 2 2026-02-26 2026-07-31 ok
view.klm-mail.com 3 2025-08-24 2026-08-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/klm-mail.com (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/klm-mail.com.