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.

8 hosts · 301 ms

HostCertsFirst seenLast seenDNS
somatica.com 12 2026-04-23 2026-09-16 ok
*.somatica.com 7 2026-04-23 2026-09-16 —
lwmail.somatica.com 4 2026-04-19 2026-08-17 ok
learn.somatica.com 21 2026-04-10 2026-10-04 ok
lwmail.learn.somatica.com 3 2026-06-29 2026-08-28 ok
shop.somatica.com 3 2026-05-16 2026-09-03 ok
www.shop.somatica.com 3 2026-05-16 2026-09-03 ok
www.somatica.com 5 2026-05-22 2026-09-09 ok

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