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.

8 hosts · 254 ms

Download CSV
HostCertsFirst seenLast seen
autodiscover.chase.exchaddev.labmorgan.com 4 2026-06-14 2026-06-23
autodiscover.jpmchase.exchaddev.labmorgan.com 4 2026-06-14 2026-06-23
email.exchaddev.labmorgan.com 6 2025-07-28 2026-06-23
autodiscover.jpmorgan.exchaddev.labmorgan.com 4 2026-06-14 2026-06-23
autodiscover.exchaddev.labmorgan.com 13 2025-07-29 2026-09-01
ews.exchaddev.labmorgan.com 13 2025-07-29 2026-09-01
mailews.exchaddev.labmorgan.com 4 2026-06-14 2026-06-23
rest.exchaddev.labmorgan.com 1 2026-06-14 2026-06-14

Programmatic access: API GET /v1/hosts/exchaddev.labmorgan.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/exchaddev.labmorgan.com.