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.

12 hosts · 260 ms

HostCertsFirst seenLast seenDNS
m3.email.adobe.com 3 2025-06-13 2025-06-19 nxdomain
res3.email.adobe.com 4 2025-06-13 2025-06-19 nxdomain
t3.email.adobe.com 2 2025-06-13 2025-06-19 nxdomain
m4.email.adobe.com 2 2025-06-13 2025-06-19 nxdomain
m5.email.adobe.com 2 2025-06-13 2025-06-19 nxdomain
m6.email.adobe.com 2 2025-06-13 2025-06-19 nxdomain
m7.email.adobe.com 2 2025-06-13 2025-06-19 nxdomain
data.email.adobe.com 4 2026-03-26 2026-09-11 ok
t-trg.email.adobe.com 1 2025-07-30 2025-07-30 nxdomain
cdn.email.adobe.com 2 2026-03-26 2026-08-26 ok
t-stgtrigger.email.adobe.com 1 2025-07-30 2025-07-30 nxdomain
t-devtrigger.email.adobe.com 1 2025-07-30 2025-07-30 nxdomain

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