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.

24 hosts · 268 ms

HostCertsFirst seenLast seen
fullscript.com 65 2025-06-15 2026-10-05
*.fullscript.com 56 2025-06-15 2026-10-03
academy-classic.fullscript.com 4 2026-06-08 2026-06-08
email.message.fullscript.com 2 2026-03-01 2026-07-17
secure.fullscript.com 2 2025-07-24 2026-06-24
static-secure.fullscript.com 2 2025-07-24 2026-06-24
jamf-posture.fullscript.com 5 2026-07-24 2026-09-21
*.jamf-posture.fullscript.com 5 2026-07-24 2026-09-21
sophos-posture.fullscript.com 5 2026-08-07 2026-10-05
*.sophos-posture.fullscript.com 5 2026-08-07 2026-10-05
jamf-protect-posture.fullscript.com 6 2026-08-07 2026-10-05
*.jamf-protect-posture.fullscript.com 6 2026-08-07 2026-10-05
links-staging.fullscript.com 1 2026-07-22 2026-07-22
msg.fullscript.com 4 2026-05-20 2026-05-20
patientslp.fullscript.com 6 2026-05-08 2026-09-03
email.practitioner.fullscript.com 2 2026-03-01 2026-07-17
labs.fullscript.com 8 2026-08-07 2026-10-05
links.fullscript.com 2 2026-03-01 2026-07-17
patients.fullscript.com 4 2026-05-25 2026-05-25
journeys.fullscript.com 6 2026-06-03 2026-08-01
get.fullscript.com 10 2026-05-06 2026-09-02
email.patient.fullscript.com 2 2026-03-01 2026-07-17
www.support.fullscript.com 5 2026-05-17 2026-09-14
links-review.fullscript.com 1 2026-07-22 2026-07-22

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