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) · 257 ms

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HostCertsFirst seenLast seen
nsf.org 24 2026-04-29 2026-08-30
*.nsf.org 9 2026-02-11 2026-08-30
cms10.nsf.org 4 2026-06-14 2026-10-12
shsbc01.nsf.org 6 2025-07-25 2026-08-20
www.shsbc01.nsf.org 6 2025-07-25 2026-08-20
indelsbc01.nsf.org 1 2026-02-06 2026-02-06
www.indelsbc01.nsf.org 1 2026-02-06 2026-02-06
shsbc02.nsf.org 2 2025-12-30 2026-10-15
www.shsbc02.nsf.org 2 2025-12-30 2026-10-15
mystg2.nsf.org 9 2026-04-22 2026-10-04
webmail2.nsf.org 1 2025-11-11 2025-11-11
www.webmail2.nsf.org 1 2025-11-11 2025-11-11
www2.nsf.org 9 2026-05-13 2026-10-10
nsfaaex2.nsf.org 3 2025-07-15 2026-07-15
my2.nsf.org 11 2026-06-17 2026-10-15
usaad-hubbl03.nsf.org 3 2026-05-28 2026-08-19
mytest3.nsf.org 9 2026-05-08 2026-10-13
usaad-co04.nsf.org 41 2026-04-20 2026-09-21
usaad-co05.nsf.org 41 2026-04-20 2026-09-21
usaad-co06.nsf.org 41 2026-04-20 2026-09-21
algolia.nsf.org 6 2026-05-04 2026-08-30
nsftraining.oceania.nsf.org 19 2026-05-04 2026-09-04
nsftraining.la.nsf.org 19 2026-05-04 2026-09-07
nsftraining.na.nsf.org 21 2026-05-04 2026-09-07
nsftraining.sa.nsf.org 23 2026-05-04 2026-09-21
appmta.nsf.org 3 2026-05-28 2026-08-25
lab.nsf.org 3 2026-04-08 2026-09-22
www.lab.nsf.org 3 2026-04-08 2026-09-22
helpkb.nsf.org 5 2026-05-06 2026-09-03
viewlinc.nsf.org 3 2026-05-28 2026-08-25
listings-poc.nsf.org 1 2026-06-10 2026-06-10
hd.nsf.org 5 2026-05-29 2026-09-26
brand.nsf.org 4 2026-06-16 2026-10-14
nsftraining.ind.nsf.org 25 2026-05-04 2026-09-04
qai-inc-prod.nsf.org 2 2026-05-16 2026-09-29
nsfsport-prod.nsf.org 3 2026-05-22 2026-10-03
password.nsf.org 5 2026-05-14 2026-09-11
listings-poc-service.nsf.org 4 2026-02-23 2026-10-07
listings-service.nsf.org 3 2026-05-11 2026-09-22
listings-test-service.nsf.org 4 2026-02-19 2026-10-03
farms-caeu-test-service.nsf.org 4 2026-01-25 2026-09-10
farms-caeu-service.nsf.org 2 2026-04-11 2026-08-03
storage.nsf.org 2 2026-01-21 2026-06-12
elevate-stage.nsf.org 3 2026-06-04 2026-08-13
knowledge.nsf.org 5 2026-05-31 2026-09-28
snowflake.nsf.org 5 2026-05-28 2026-09-24
hubble.nsf.org 3 2026-05-28 2026-08-19
labware.nsf.org 1 2026-06-10 2026-06-10
www.labware.nsf.org 1 2026-06-10 2026-06-10
elevate.nsf.org 3 2026-06-04 2026-08-13
remote.nsf.org 5 2026-05-11 2026-09-08
nsfcmg.nsf.org 7 2025-07-01 2026-07-02
www.nsfcmg.nsf.org 3 2025-07-01 2026-07-02
onboarding.nsf.org 5 2026-05-14 2026-09-11
api2.stg.nsf.org 1 2026-10-08 2026-10-08
api.stg.nsf.org 1 2026-06-09 2026-06-09
auditstg.nsf.org 2 2026-02-20 2026-07-10
mystg.nsf.org 2 2026-06-05 2026-06-10
www.mystg.nsf.org 1 2026-06-05 2026-06-05
bug.nsf.org 5 2026-05-04 2026-09-01
auth.nsf.org 1 2025-10-22 2025-10-22
www.auth.nsf.org 1 2025-10-22 2025-10-22
clientauth.nsf.org 4 2026-04-20 2026-08-18
admin.clientauth.nsf.org 4 2026-04-20 2026-08-18
api.nsf.org 3 2026-05-14 2026-09-27
foodtraining.uk.nsf.org 7 2026-05-16 2026-09-07
portal.nsf.org 1 2026-01-01 2026-01-01
www.portal.nsf.org 1 2026-01-01 2026-01-01
aamail.nsf.org 5 2025-07-15 2026-07-15
webmail.nsf.org 2 2025-09-16 2025-11-11
www.webmail.nsf.org 2 2025-09-16 2025-11-11
oxfordmail.nsf.org 2 2025-09-16 2025-11-11
appmail.nsf.org 8 2025-07-15 2026-07-29
www.appmail.nsf.org 6 2025-07-15 2026-07-29
oam.nsf.org 5 2025-09-04 2026-10-14
www.oam.nsf.org 5 2025-09-04 2026-10-14
onlineexam.nsf.org 7 2025-09-20 2026-09-21
www.onlineexam.nsf.org 3 2025-09-20 2026-09-21
icom.nsf.org 1 2026-10-05 2026-10-05
nsftraining.main.nsf.org 21 2026-05-04 2026-09-04
info.nsf.org 3 2025-10-18 2026-05-06
www.info.nsf.org 3 2025-10-18 2026-05-06
clientdemo.nsf.org 5 2026-05-09 2026-09-06
photo.nsf.org 4 2026-06-07 2026-10-05
bip.nsf.org 3 2026-05-29 2026-06-21
www.bip.nsf.org 3 2026-05-29 2026-06-21
help.nsf.org 9 2026-04-03 2026-09-21
www.help.nsf.org 1 2026-04-03 2026-04-03
callhelp.nsf.org 4 2026-04-12 2026-08-23
gethelp.nsf.org 5 2026-04-11 2026-08-21
shop.nsf.org 5 2026-05-13 2026-09-10
com.prod.app.nsf.org 8 2026-05-20 2026-09-17
com.nonprod.app.nsf.org 11 2026-05-20 2026-08-14
mobilesetup.nsf.org 5 2026-05-07 2026-09-04
transfer.nsf.org 3 2026-03-31 2026-10-13
www.transfer.nsf.org 3 2026-03-31 2026-10-13
sellerpartner.nsf.org 18 2026-05-05 2026-09-01
autodiscover.nsf.org 2 2025-09-16 2025-11-11
concur.nsf.org 5 2026-04-23 2026-08-21
nsftraining.eur.nsf.org 25 2026-05-04 2026-09-04

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/nsf.org.

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/nsf.org.