Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

10 hosts · 200 ms

HostCertsFirst seenLast seen
omhucph.com 22 2026-04-15 2026-09-27
*.omhucph.com 5 2026-05-01 2026-08-30
ca.omhucph.com 3 2026-07-16 2026-09-14
ch.omhucph.com 7 2026-04-17 2026-08-27
uk.omhucph.com 9 2026-04-17 2026-08-27
no.omhucph.com 7 2026-04-17 2026-08-27
brand-assets.omhucph.com 5 2026-06-01 2026-09-29
us.omhucph.com 15 2026-04-27 2026-09-07
www.us.omhucph.com 15 2026-05-10 2026-09-20
www.omhucph.com 17 2026-04-17 2026-09-27

Programmatic access: API GET /v1/hosts/omhucph.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/omhucph.com.