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.

26 hosts · 202 ms

HostCertsFirst seenLast seen
perrytech.edu 20 2026-04-16 2026-09-22
*.perrytech.edu 16 2026-01-14 2026-09-22
s2.perrytech.edu 4 2026-01-14 2026-01-16
pa.perrytech.edu 2 2026-01-14 2026-01-20
service.perrytech.edu 12 2026-04-22 2026-08-18
inst8-rdg.perrytech.edu 2 2026-01-14 2026-01-21
remoteappspti.perrytech.edu 1 2026-01-14 2026-01-14
link.perrytech.edu 5 2026-06-06 2026-10-04
mail.perrytech.edu 3 2026-01-14 2026-01-22
keeperkcm.perrytech.edu 2 2026-01-14 2026-01-21
pa-admin.perrytech.edu 2 2026-01-14 2026-01-20
pa-s-admin.perrytech.edu 2 2026-01-14 2026-01-21
remoteapp.perrytech.edu 2 2026-01-14 2026-01-21
netpartner.perrytech.edu 12 2026-05-25 2026-09-20
autodiscover.perrytech.edu 2 2026-01-14 2026-01-22
mta-sts.perrytech.edu 6 2026-06-03 2026-10-01
alertus.perrytech.edu 2 2026-01-14 2026-01-22
ft.perrytech.edu 2 2026-01-14 2026-01-20
mta-sts.student.perrytech.edu 6 2026-05-16 2026-09-14
support.perrytech.edu 2 2026-08-27 2026-08-27
remoteapptest.perrytech.edu 2 2026-01-14 2026-01-21
mytest.perrytech.edu 2 2026-01-14 2026-01-21
sbc0-us-west.perrytech.edu 3 2026-01-14 2026-01-21
api-conv.perrytech.edu 1 2026-01-14 2026-01-14
www.perrytech.edu 5 2026-05-24 2026-09-21
my.perrytech.edu 9 2026-05-25 2026-09-20

Programmatic access: API GET /v1/hosts/perrytech.edu (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/perrytech.edu.