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.

14 hosts · 323 ms

HostCertsFirst seenLast seenDNS
kmong.com 2 2026-03-03 2026-07-19 ok
*.kmong.com 4 2026-02-19 2026-07-19 —
capig.kmong.com 2 2025-11-06 2025-11-06 ok
*.capig.kmong.com 1 2025-11-06 2025-11-06 —
2a57j78kdpl7he9aiikai1te86vannh.capig.kmong.com 1 2025-11-06 2025-11-06 ok
phone-counseling.kmong.com 1 2026-02-03 2026-02-03 ok
blog.kmong.com 14 2026-05-08 2026-09-03 ok
hi.kmong.com 5 2026-05-09 2026-09-05 ok
click.kmong.com 12 2026-05-03 2026-08-29 ok
cdn.kmong.com 1 2025-12-30 2025-12-30 ok
*.cdn.kmong.com 1 2025-12-30 2025-12-30 —
mta-sts.kmong.com 5 2026-05-13 2026-10-02 ok
support.kmong.com 4 2026-05-15 2026-07-14 ok
company.kmong.com 2 2026-03-23 2026-08-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/kmong.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/kmong.com.