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.

47 hosts · 186 ms

HostCertsFirst seenLast seen
rmu.edu 7 2025-10-20 2026-08-30
*.rmu.edu 1 2025-10-20 2025-10-20
ema.rmu.edu 2 2026-04-03 2026-09-18
infsweb.rmu.edu 3 2026-04-03 2026-09-18
LDC-EMA-1.ad.rmu.edu 2 2026-04-03 2026-09-18
expa-ise-01.ad.rmu.edu 3 2026-04-10 2026-08-17
ldc-ise-01.ad.rmu.edu 3 2026-04-10 2026-08-17
expa-ise-02.ad.rmu.edu 3 2026-04-10 2026-08-17
ldc-ise-02.ad.rmu.edu 3 2026-04-10 2026-08-17
expa-ise-03.ad.rmu.edu 3 2026-04-10 2026-08-17
PS07.ad.rmu.edu 3 2025-08-20 2026-08-05
ADAP-PROD.ad.rmu.edu 1 2026-02-02 2026-02-02
instantid.ad.rmu.edu 3 2026-06-04 2026-06-04
bbtsapp.ad.rmu.edu 2 2026-04-15 2026-09-29
www.bbtsapp.ad.rmu.edu 2 2026-04-15 2026-09-29
reports.ad.rmu.edu 3 2026-04-03 2026-09-18
instantid.rmu.edu 3 2026-06-04 2026-06-04
outbound.rmu.edu 2 2026-04-03 2026-09-18
remote.rmu.edu 1 2026-04-02 2026-04-02
rmucmg.rmu.edu 1 2025-10-24 2025-10-24
plannedgiving.rmu.edu 7 2026-05-31 2026-09-29
reddog.rmu.edu 3 2026-04-03 2026-09-18
*.reddog.rmu.edu 3 2026-04-03 2026-09-18
catalog.rmu.edu 17 2025-06-18 2026-09-17
mta-sts.alumni.rmu.edu 2 2026-02-20 2026-07-11
webwork.rmu.edu 5 2026-05-01 2026-09-01
mta-sts.mail.rmu.edu 2 2026-02-18 2026-07-09
highschool.rmu.edu 2 2025-07-09 2026-06-09
polycom.rmu.edu 2 2026-04-03 2026-09-18
revolution.rmu.edu 5 2026-05-09 2026-09-06
vpn.rmu.edu 1 2026-04-02 2026-04-02
video.rmu.edu 2 2025-08-04 2026-07-05
ldap.rmu.edu 1 2025-10-20 2025-10-20
careercenter.rmu.edu 6 2026-05-06 2026-10-01
libguides.rmu.edu 5 2026-04-24 2026-08-21
cis.rmu.edu 3 2026-05-11 2026-09-12
admissions.rmu.edu 5 2026-06-07 2026-10-03
careers.rmu.edu 1 2025-11-20 2025-11-20
honors.rmu.edu 4 2026-04-29 2026-10-08
jss.rmu.edu 1 2026-04-06 2026-04-06
mta-sts.rmu.edu 2 2026-02-15 2026-07-08
radius.rmu.edu 3 2026-04-10 2026-08-17
mobileprint.rmu.edu 3 2025-08-20 2026-08-05
test.rmu.edu 5 2026-05-02 2026-08-30
dev.rmu.edu 5 2026-05-02 2026-08-30
www.rmu.edu 6 2026-05-02 2026-08-30
sentry.rmu.edu 1 2025-10-20 2025-10-20

Programmatic access: API GET /v1/hosts/rmu.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/rmu.edu.