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) · 282 ms

HostCertsFirst seenLast seen
nn.nl 7 2025-08-27 2026-08-26
*.nn.nl 4 2025-08-27 2026-06-29
wed01kvkfa01.nn.nl 1 2025-11-06 2025-11-06
wep01kvkfa01.nn.nl 1 2025-11-06 2025-11-06
test1.nn.nl 2 2026-09-18 2026-09-18
psd2.nn.nl 7 2025-11-05 2026-09-06
developer.psd2.nn.nl 6 2026-03-19 2026-09-29
acme-test-win2.nn.nl 1 2026-08-05 2026-08-05
test2.nn.nl 1 2026-09-21 2026-09-21
test3.nn.nl 2 2026-09-21 2026-09-21
test4.nn.nl 2 2026-09-22 2026-09-22
l845.nn.nl 2 2025-09-03 2026-08-04
test5.nn.nl 2 2026-09-22 2026-09-22
test6.nn.nl 4 2026-09-23 2026-09-29
test7.nn.nl 3 2026-09-29 2026-09-29
web.nn.nl 3 2026-06-06 2026-08-21
psd2-acc.nn.nl 5 2025-08-18 2026-09-06
psd2-saltedge-connector-acc.nn.nl 1 2026-06-23 2026-06-23
personetics-insights-acc.nn.nl 3 2025-09-29 2026-09-14
europort-saas.acc.nn.nl 2 2026-04-07 2026-04-07
www.arrearsmanagement.acc.nn.nl 1 2025-12-12 2025-12-12
externalidpacc.nn.nl 3 2025-08-21 2026-08-21
auth.tc.dcard.nn.nl 1 2025-08-21 2025-08-21
encpan.tc.dcard.nn.nl 1 2025-08-21 2025-08-21
client.dcard.nn.nl 2 2025-07-01 2026-07-14
acc.client.dcard.nn.nl 1 2026-05-21 2026-05-21
personetics-insights-prd.nn.nl 3 2025-10-29 2025-11-04
europort.saas.prd.nn.nl 1 2026-06-23 2026-06-23
letselschade.nn.nl 3 2025-11-09 2026-10-01
acc.letselschade.nn.nl 3 2025-11-12 2026-10-01
login.acc.letselschade.nn.nl 1 2026-02-06 2026-02-06
login.letselschade.nn.nl 1 2026-02-06 2026-02-06
tst.letselschade.nn.nl 3 2025-11-12 2026-10-01
doc.dev.letselschade.nn.nl 18 2025-07-20 2026-02-27
reactupgrade.dev.letselschade.nn.nl 1 2026-01-27 2026-01-27
nextupgrade.dev.letselschade.nn.nl 1 2026-01-12 2026-01-12
envelope.dev.letselschade.nn.nl 1 2025-10-29 2025-10-29
engf.dev.letselschade.nn.nl 1 2025-11-03 2025-11-03
handlerimg.dev.letselschade.nn.nl 1 2026-06-04 2026-06-04
eng.dev.letselschade.nn.nl 4 2025-10-14 2025-11-07
cwthreesplk.dev.letselschade.nn.nl 1 2025-12-17 2025-12-17
cwtosplk.dev.letselschade.nn.nl 1 2025-12-03 2025-12-03
cwsplk.dev.letselschade.nn.nl 1 2025-11-26 2025-11-26
cwsplnk.dev.letselschade.nn.nl 1 2025-11-25 2025-11-25
nextesm.dev.letselschade.nn.nl 1 2026-01-12 2026-01-12
nextfifteen.dev.letselschade.nn.nl 2 2025-12-03 2025-12-23
phvtwo.dev.letselschade.nn.nl 1 2026-03-26 2026-03-26
csp.dev.letselschade.nn.nl 1 2026-07-17 2026-07-17
nodeup.dev.letselschade.nn.nl 1 2026-02-17 2026-02-17
header.dev.letselschade.nn.nl 1 2026-04-03 2026-04-03
csperr.dev.letselschade.nn.nl 1 2026-06-05 2026-06-05
ams.dev.letselschade.nn.nl 8 2025-07-04 2025-11-26
fonts.dev.letselschade.nn.nl 1 2026-02-06 2026-02-06
spragt.dev.letselschade.nn.nl 1 2026-06-30 2026-06-30
superagent.dev.letselschade.nn.nl 1 2026-06-29 2026-06-29
fifteennext.dev.letselschade.nn.nl 1 2025-12-22 2025-12-22
data.communicatie.nn.nl 5 2026-03-08 2026-08-24
informatie.communicatie.nn.nl 4 2026-03-13 2026-08-29
cdn.communicatie.nn.nl 5 2025-08-18 2026-09-29
magazine.nn.nl 1 2026-04-07 2026-04-07
*.magazine.nn.nl 1 2026-04-07 2026-04-07
client.tc.dcard.jwe.nn.nl 1 2025-08-21 2025-08-21
making.nn.nl 5 2026-04-15 2026-09-21
redirect.making.nn.nl 6 2026-04-14 2026-09-21
test.making.nn.nl 3 2026-04-14 2026-09-15
redirect.test.making.nn.nl 3 2026-03-16 2026-09-15
preview.making.nn.nl 3 2026-04-21 2026-09-21
external-learning.nn.nl 20 2025-09-09 2026-09-13
invullengezondheidsverklaring.nn.nl 4 2026-03-13 2026-07-30
mail.research.nn.nl 4 2026-05-16 2026-07-31
ai.nn.nl 1 2026-05-22 2026-05-22
secure-api.nn.nl 5 2025-08-12 2026-07-29
test-api.nn.nl 4 2026-08-19 2026-08-20
feedback.nn.nl 1 2026-06-23 2026-06-23
persoonlijkvoorstel.nn.nl 5 2025-09-12 2026-07-30
acc-persoonlijkvoorstel.nn.nl 1 2025-09-12 2025-09-12
login.acc-persoonlijkvoorstel.nn.nl 2 2025-09-12 2026-09-10
login.persoonlijkvoorstel.nn.nl 2 2025-09-12 2026-09-10
data.mail.nn.nl 5 2026-03-08 2026-08-24
informatie.mail.nn.nl 4 2026-03-14 2026-09-01
cdn.mail.nn.nl 5 2025-08-18 2026-09-29
test-san.nn.nl 2 2026-09-07 2026-09-07
www.test-san.nn.nl 2 2026-09-07 2026-09-07
www.ikben.nn.nl 4 2025-09-17 2026-07-19
elektrischrijden.nn.nl 2 2025-10-07 2026-08-19
tst-elektrischrijden.nn.nl 2 2026-08-13 2026-08-13
acme-test-win.nn.nl 1 2026-08-05 2026-08-05
publiek.mijn.nn.nl 4 2025-09-17 2026-07-19
kennisbank.mijn.nn.nl 4 2025-09-17 2026-07-19
www.mijn.nn.nl 4 2025-09-17 2026-07-19
expo.nn.nl 1 2026-05-26 2026-05-26
externalidp.nn.nl 3 2025-09-02 2026-08-20
content.lp.nn.nl 9 2026-04-18 2026-09-15
app.nn.nl 14 2026-05-23 2026-09-18
testp.nn.nl 3 2026-09-10 2026-09-17
www.pensioenbeheer.nn.nl 4 2025-09-17 2026-07-19
web.flowmailer.nn.nl 3 2026-05-21 2026-08-05
www.advisuer.nn.nl 4 2025-09-17 2026-07-19
psd2-saltedge-connector.nn.nl 1 2026-06-23 2026-06-23
secure-adviseur.nn.nl 5 2025-08-12 2026-07-29

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/nn.nl.

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/nn.nl.