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.

28 hosts · 304 ms

HostCertsFirst seenLast seen
connectionsacademy.com 4 2026-01-14 2026-08-04
sancert1-pmc.connectionsacademy.com 2 2025-07-22 2026-07-21
sancert2-pmc.connectionsacademy.com 2 2025-07-23 2026-06-22
sancert3-pmc.connectionsacademy.com 2 2025-07-23 2026-07-22
sancert4-pmc.connectionsacademy.com 2 2025-07-23 2026-07-21
sancert5-pmc.connectionsacademy.com 2 2025-07-22 2026-07-21
sancert6-pmc.connectionsacademy.com 1 2025-12-08 2025-12-08
sancert7-pmc.connectionsacademy.com 1 2026-07-08 2026-07-08
experience.connectionsacademy.com 22 2025-07-23 2026-10-01
cloud.mail.connectionsacademy.com 1 2026-02-06 2026-02-06
image.mail.connectionsacademy.com 4 2025-11-19 2026-09-07
click.mail.connectionsacademy.com 1 2025-11-01 2025-11-01
view.mail.connectionsacademy.com 1 2025-11-01 2025-11-01
classroom.connectionsacademy.com 1 2025-09-18 2025-09-18
pm.connectionsacademy.com 4 2026-06-11 2026-10-09
ssgtm.connectionsacademy.com 4 2026-05-01 2026-10-07
learn.connectionsacademy.com 4 2025-10-22 2026-09-29
uat-learn.connectionsacademy.com 4 2025-10-22 2026-09-29
info.connectionsacademy.com 1 2025-11-01 2025-11-01
cloud.comms.connectionsacademy.com 2 2025-08-12 2026-07-30
image.comms.connectionsacademy.com 3 2025-07-07 2026-07-25
click.comms.connectionsacademy.com 2 2025-09-24 2026-09-12
view.comms.connectionsacademy.com 2 2025-08-12 2026-07-30
sancert1-pmc-tempdomains.connectionsacademy.com 2 2025-10-23 2026-05-11
mta-sts.connectionsacademy.com 5 2026-05-06 2026-09-03
test.connectionsacademy.com 2 2025-09-22 2026-07-21
www.test.connectionsacademy.com 2 2025-09-22 2026-07-21
www.connectionsacademy.com 5 2025-10-22 2026-09-29

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