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.

100 hosts (first page) · 252 ms

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HostCertsFirst seenLast seen
siu.edu 15 2025-11-20 2026-07-21
*.siu.edu 11 2025-11-20 2026-01-07
banssb1.siu.edu 2 2025-09-05 2026-08-07
ais-test1.siu.edu 2 2025-07-24 2026-06-25
ais-dev1.siu.edu 2 2025-09-05 2026-08-07
banssb2.siu.edu 1 2026-05-11 2026-05-11
hrss2.siu.edu 1 2026-02-20 2026-02-20
banssb3.siu.edu 1 2025-11-21 2025-11-21
tera64.siu.edu 3 2026-03-27 2026-09-11
tera32-2025.siu.edu 2 2026-03-27 2026-09-11
auth-cobia.siu.edu 3 2026-06-02 2026-10-02
www.careeraccelerator.cola.siu.edu 7 2026-06-02 2026-09-07
checkout.mcma.siu.edu 4 2026-06-18 2026-07-23
banema.siu.edu 2 2026-04-15 2026-10-01
*.infra.siu.edu 1 2026-01-05 2026-01-05
*.asa.siu.edu 6 2026-01-05 2026-01-07
patch-db.siu.edu 1 2025-10-22 2025-10-22
*.web.siu.edu 6 2026-01-05 2026-01-07
testplesk-vm1.web.siu.edu 4 2026-04-01 2026-10-03
testplesk-vm2.web.siu.edu 2 2026-04-14 2026-10-03
shawnee.web.siu.edu 2 2026-04-15 2026-10-05
stage.web.siu.edu 1 2026-03-03 2026-03-03
teststage.web.siu.edu 1 2026-03-05 2026-03-05
cochise.web.siu.edu 2 2026-04-15 2026-10-05
drommel.web.siu.edu 2 2026-04-15 2026-10-05
geronimo.web.siu.edu 2 2026-04-15 2026-10-05
*.lib.siu.edu 6 2026-01-05 2026-01-07
opensiuc.lib.siu.edu 5 2026-06-09 2026-08-25
libcal.lib.siu.edu 4 2026-06-12 2026-10-10
libguides.lib.siu.edu 4 2026-06-20 2026-10-18
www.lib.siu.edu 6 2026-01-05 2026-01-07
proxy.lib.siu.edu 3 2025-09-29 2026-06-01
*.proxy.lib.siu.edu 3 2025-09-29 2026-06-01
solopac.c-lawlib.siu.edu 5 2026-04-23 2026-08-24
ssb.siu.edu 1 2025-11-14 2025-11-14
sbc.siu.edu 1 2026-05-13 2026-05-13
online.rec.siu.edu 2 2025-10-22 2026-08-04
ad.siu.edu 3 2025-09-02 2026-08-19
*.ad.siu.edu 1 2026-08-26 2026-08-26
it-vdi-sec1.ad.siu.edu 4 2026-03-31 2026-09-24
it-vdi-drc1.ad.siu.edu 4 2026-03-31 2026-09-24
itsys-iamsql-l1.ad.siu.edu 7 2026-04-21 2026-10-13
itsys-iamsql1.ad.siu.edu 5 2026-04-21 2026-10-13
it-vdi-conn1.ad.siu.edu 4 2026-03-31 2026-09-24
it-vdi-libconn1.ad.siu.edu 4 2026-03-31 2026-09-24
it-vdi-sahconn1.ad.siu.edu 4 2026-03-31 2026-09-24
rmdocsrv1.ad.siu.edu 2 2025-09-18 2026-05-21
it-vdi-sec2.ad.siu.edu 4 2026-03-31 2026-09-24
itsys-iamsql-l2.ad.siu.edu 5 2026-04-22 2026-10-13
it-mcl2.ad.siu.edu 3 2025-09-02 2026-08-19
itsys-iamsql2.ad.siu.edu 4 2026-04-21 2026-10-13
it-wham2.ad.siu.edu 3 2025-09-02 2026-08-19
it-vdi-conn2.ad.siu.edu 4 2026-03-31 2026-09-24
shpserver19.ad.siu.edu 1 2026-03-05 2026-03-05
shpserver19-tempura.ad.siu.edu 1 2026-03-05 2026-03-05
it-azdc.ad.siu.edu 3 2025-09-02 2026-08-19
it-scad.ad.siu.edu 3 2025-09-02 2026-08-19
itapp-moveit-prod.ad.siu.edu 7 2025-10-08 2026-10-08
itapp-xwebprod.ad.siu.edu 3 2025-11-16 2026-10-01
itapp-xappprod.ad.siu.edu 1 2026-02-03 2026-02-03
wacme.ad.siu.edu 1 2026-08-26 2026-08-26
*.vdi.ad.siu.edu 4 2026-03-31 2026-09-24
it-vcsavdi.ad.siu.edu 4 2026-03-31 2026-09-24
it-mcl.ad.siu.edu 3 2025-09-02 2026-08-19
it-wham.ad.siu.edu 3 2025-09-02 2026-08-19
shpserver19-opencomm.ad.siu.edu 1 2026-03-05 2026-03-05
issm.ad.siu.edu 2 2025-10-15 2026-09-21
sc-atrium.ad.siu.edu 5 2025-08-25 2026-10-01
it-vdi-cmp.ad.siu.edu 4 2026-03-31 2026-09-24
itsys-adminctr.ad.siu.edu 2 2026-02-02 2026-08-12
ems.ad.siu.edu 5 2025-12-18 2026-08-18
itts-cwps.ad.siu.edu 3 2025-09-18 2026-07-28
itsys-access.ad.siu.edu 1 2025-08-15 2025-08-15
wsiuross.ad.siu.edu 1 2026-01-15 2026-01-15
test.ad.siu.edu 2 2025-08-20 2025-08-25
emsweb-test.ad.siu.edu 1 2026-08-17 2026-08-17
wacme-test.ad.siu.edu 8 2026-06-30 2026-07-16
www.wacme-test.ad.siu.edu 2 2026-06-30 2026-07-09
issm-test.ad.siu.edu 2 2025-10-15 2026-09-21
itapp-xwebtest.ad.siu.edu 4 2025-11-05 2026-10-01
itapp-xapptest.ad.siu.edu 9 2026-02-03 2026-07-18
itapp-moveittest.ad.siu.edu 1 2026-10-09 2026-10-09
itapp-ssis-dev.ad.siu.edu 1 2026-06-16 2026-06-16
siufax.ad.siu.edu 2 2025-09-10 2026-08-11
abroad.siu.edu 5 2026-05-28 2026-09-13
netid.siu.edu 3 2026-03-09 2026-09-22
banam-prod.siu.edu 2 2025-09-05 2026-08-07
banssb1-pprd.siu.edu 1 2026-05-07 2026-05-07
banssb2-pprd.siu.edu 2 2025-11-11 2026-10-13
banssb3-pprd.siu.edu 1 2025-11-21 2025-11-21
banam-pprd.siu.edu 2 2026-04-15 2026-10-01
banadm-pprd.siu.edu 1 2026-06-10 2026-06-10
banap-pprd.siu.edu 1 2026-02-23 2026-02-23
dce.siu.edu 4 2025-11-17 2026-02-12
www.dce.siu.edu 3 2026-02-10 2026-02-12
example.siu.edu 11 2026-02-04 2026-02-09
*.time.siu.edu 2 2025-10-02 2026-09-21
*.pool.time.siu.edu 2 2025-10-02 2026-09-21
*.ne.siu.edu 1 2026-06-18 2026-06-18
whamnacengine.ne.siu.edu 1 2026-07-13 2026-07-13

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/siu.edu.

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/siu.edu.