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) · 220 ms

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HostCertsFirst seenLast seen
springfield.edu 5 2026-05-03 2026-10-03
yucca.springfield.edu 1 2025-06-25 2025-06-25
beluga.springfield.edu 2 2026-02-01 2026-05-23
tutortrac.springfield.edu 4 2025-10-08 2026-09-08
fennec.springfield.edu 2 2026-02-01 2026-07-06
scmc.springfield.edu 2 2025-09-14 2026-07-20
puma.scmc.springfield.edu 2 2025-09-14 2026-07-20
scua.scmc.springfield.edu 2 2025-07-09 2026-07-20
liger.scua.scmc.springfield.edu 2 2025-07-09 2026-07-20
tiger.scua.scmc.springfield.edu 2 2025-07-09 2026-07-20
admaster.scua.scmc.springfield.edu 2 2025-07-09 2026-07-20
cougar.scmc.springfield.edu 2 2025-09-14 2026-07-20
jaguar.scmc.springfield.edu 2 2025-09-14 2026-07-20
scnr.scmc.springfield.edu 2 2025-07-09 2026-07-20
cheetah.scnr.scmc.springfield.edu 2 2025-07-09 2026-07-20
lion.scnr.scmc.springfield.edu 2 2025-07-09 2026-07-20
admaster.scnr.scmc.springfield.edu 2 2025-07-09 2026-07-20
goldenrod.springfield.edu 1 2026-04-27 2026-04-27
www.goldenrod.springfield.edu 1 2026-04-27 2026-04-27
cxprod.springfield.edu 2 2026-02-01 2026-07-20
mockingbird.springfield.edu 3 2025-06-25 2026-07-20
password.springfield.edu 2 2026-02-01 2026-05-23
advance.springfield.edu 4 2026-06-09 2026-10-07
sccmptrscience.springfield.edu 1 2025-07-20 2025-07-20
nuthatchee.springfield.edu 3 2025-06-25 2026-07-20
triangle.springfield.edu 2 2025-06-25 2026-05-20
grackle.springfield.edu 3 2025-07-09 2026-05-25
mnemosyne.springfield.edu 1 2025-08-17 2025-08-17
amphitrite.springfield.edu 2 2025-10-09 2026-05-25
securesite.springfield.edu 2 2026-02-01 2026-07-20
wellnessinstitute.springfield.edu 2 2025-09-14 2026-05-20
nyhof.springfield.edu 5 2026-05-21 2026-09-18
frigg.springfield.edu 2 2025-11-04 2026-05-25
logging.springfield.edu 1 2026-04-27 2026-04-27
www.logging.springfield.edu 1 2026-04-27 2026-04-27
ipad-deptcounseling.springfield.edu 1 2025-09-14 2025-09-14
dining.springfield.edu 2 2025-09-02 2026-08-03
campusprinting.springfield.edu 2 2026-08-14 2026-08-14
plannedgiving.springfield.edu 4 2026-06-20 2026-10-18
catalog.springfield.edu 2 2026-02-01 2026-07-20
m.catalog.springfield.edu 2 2026-02-01 2026-07-20
thoth.springfield.edu 1 2026-09-12 2026-09-12
taino.wifi.springfield.edu 2 2026-05-26 2026-05-26
amberjack.springfield.edu 1 2026-05-23 2026-05-23
gulick.springfield.edu 5 2026-06-02 2026-09-29
lark.springfield.edu 2 2025-10-09 2026-07-20
mackerel.springfield.edu 2 2025-12-29 2026-05-24
naismithcam.springfield.edu 1 2025-10-09 2025-10-09
serapeum.springfield.edu 2 2025-11-13 2026-07-20
merman.springfield.edu 1 2025-11-13 2025-11-13
webdesign.springfield.edu 2 2025-08-17 2026-05-24
wpdesign.springfield.edu 2 2025-08-17 2026-05-24
bluefin.springfield.edu 2 2026-02-01 2026-05-24
poseidon.springfield.edu 3 2025-07-09 2026-05-25
vpn.springfield.edu 1 2025-12-29 2025-12-29
info.springfield.edu 10 2026-05-26 2026-09-21
gradinfo.springfield.edu 18 2026-05-30 2026-09-25
argo.springfield.edu 3 2026-02-01 2026-05-25
taino.springfield.edu 1 2025-07-21 2025-07-21
wahoo.springfield.edu 2 2025-09-14 2026-05-23
saguaro.springfield.edu 1 2025-08-17 2025-08-17
itshelp.springfield.edu 8 2026-06-06 2026-10-04
soar.springfield.edu 1 2026-05-20 2026-05-20
ipad-counselingcenter.springfield.edu 1 2026-02-01 2026-02-01
healthcenter.springfield.edu 1 2025-11-13 2025-11-13
directory-master.springfield.edu 2 2025-07-09 2026-07-20
admaster.springfield.edu 2 2025-09-14 2026-07-20
geras.springfield.edu 1 2025-11-13 2025-11-13
itsdevices.springfield.edu 1 2025-07-09 2025-07-09
trianglestories.springfield.edu 1 2026-05-20 2026-05-20
hermes.springfield.edu 2 2025-06-25 2026-05-25
ceres.springfield.edu 2 2026-02-01 2026-05-24
cscourses.springfield.edu 4 2026-06-13 2026-10-11
doves.springfield.edu 2 2025-07-09 2026-07-20
adonis.springfield.edu 2 2025-11-13 2026-07-20
serapis.springfield.edu 2 2025-11-13 2026-07-20
nemesis.springfield.edu 2 2025-08-17 2026-05-25
starlinks.springfield.edu 2 2025-12-29 2026-05-24
admissions.springfield.edu 4 2026-06-09 2026-10-05
herons.springfield.edu 2 2025-07-09 2026-07-20
scvhosts.springfield.edu 1 2026-05-20 2026-05-20
pegasus.springfield.edu 3 2025-07-09 2026-05-25
polecat.springfield.edu 2 2026-02-01 2026-07-06
seshat.springfield.edu 3 2025-12-10 2026-05-25
iguana.scnet.springfield.edu 1 2026-07-05 2026-07-05
pridenet.springfield.edu 2 2025-12-29 2026-05-20
mypridenet.springfield.edu 4 2026-06-01 2026-10-02
vmaysonet.springfield.edu 1 2025-07-21 2025-07-21
aitanit.springfield.edu 1 2025-08-10 2025-08-10
pridenetid-mgmt.springfield.edu 2 2025-08-17 2026-05-23
password-test.springfield.edu 2 2026-02-01 2026-05-23
pridenet-test.springfield.edu 4 2026-06-01 2026-10-02
papercut.springfield.edu 2 2025-08-17 2026-05-23
triangle-dev.springfield.edu 1 2026-05-20 2026-05-20
wellnessinstitute-dev.springfield.edu 2 2025-09-14 2026-05-20
listserv.springfield.edu 2 2025-09-14 2026-05-23
www.springfield.edu 4 2026-06-05 2026-10-03
ibex.springfield.edu 2 2025-12-29 2026-05-25
oryx.springfield.edu 2 2026-02-01 2026-07-06
verify.springfield.edu 3 2026-04-22 2026-09-22

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/springfield.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/springfield.edu.