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.

7 hosts · 225 ms

HostCertsFirst seenLast seen
urbanbarn.com 2 2025-07-17 2026-07-14
*.urbanbarn.com 2 2025-07-17 2026-07-14
cloud.mail.urbanbarn.com 1 2026-04-30 2026-04-30
image.mail.urbanbarn.com 4 2025-07-16 2026-09-06
click.mail.urbanbarn.com 1 2026-04-28 2026-04-28
view.mail.urbanbarn.com 1 2026-04-30 2026-04-30
gebav.urbanbarn.com 10 2026-04-29 2026-08-26

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