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.

5 hosts · 204 ms

HostCertsFirst seenLast seen
cld.email.pharmacy.amazon.com 2 2026-03-31 2026-09-01
cloud.email.pharmacy.amazon.com 1 2026-03-05 2026-03-05
image.email.pharmacy.amazon.com 3 2026-01-21 2026-01-22
click.email.pharmacy.amazon.com 1 2026-03-05 2026-03-05
view.email.pharmacy.amazon.com 1 2026-03-05 2026-03-05

Programmatic access: API GET /v1/hosts/email.pharmacy.amazon.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/email.pharmacy.amazon.com.