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.

4 hosts · 290 ms

HostCertsFirst seenLast seen
cloud.eml.aerogarden.com 1 2026-05-04 2026-05-04
image.eml.aerogarden.com 3 2026-01-07 2026-05-21
click.eml.aerogarden.com 1 2026-05-04 2026-05-04
view.eml.aerogarden.com 1 2026-05-04 2026-05-04

Programmatic access: API GET /v1/hosts/eml.aerogarden.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/eml.aerogarden.com.