Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

65 hosts · 275 ms

HostCertsFirst seenLast seenDNS
spuerkeess.lu 4 2025-11-14 2026-01-20 ok
spam1.spuerkeess.lu 1 2026-01-08 2026-01-08 ok
mx1.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
spam2.spuerkeess.lu 1 2026-01-08 2026-01-08 ok
mx2.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
bobofa.spuerkeess.lu 1 2025-11-14 2025-11-14 nodata
beta.spuerkeess.lu 4 2025-08-12 2026-09-11 ok
mailsrva.spuerkeess.lu 1 2025-11-14 2025-11-14 nxdomain
mailsrvb.spuerkeess.lu 1 2025-11-14 2025-11-14 nxdomain
mailarchive-tstc.spuerkeess.lu 2 2025-08-07 2026-08-03 ok
transfer-tstc.spuerkeess.lu 1 2026-04-23 2026-04-23 ok
my-tstc.spuerkeess.lu 1 2026-02-25 2026-02-25 ok
collab-edge.test.uc.spuerkeess.lu 1 2025-10-21 2025-10-21 nxdomain
prod.spuerkeess.lu 1 2026-01-30 2026-01-30 ok
dynatrace.spuerkeess.lu 1 2025-12-23 2025-12-23 ok
collab-edge.spuerkeess.lu 1 2026-02-25 2026-02-25 nxdomain
prod.broadridge.spuerkeess.lu 1 2026-01-20 2026-01-20 nxdomain
uat.broadridge.spuerkeess.lu 1 2026-01-20 2026-01-20 nxdomain
travelerexterne.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
activegate.spuerkeess.lu 1 2025-12-23 2025-12-23 ok
mailarchive.spuerkeess.lu 2 2025-08-07 2026-08-03 ok
cpg.spuerkeess.lu 1 2026-01-20 2026-01-20 nxdomain
prod.vdi.spuerkeess.lu 2 2025-07-28 2026-09-17 ok
pilo.vdi.spuerkeess.lu 2 2025-07-28 2026-02-27 ok
api.spuerkeess.lu 1 2025-11-28 2025-11-28 ok
tstcapi.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
testapi.spuerkeess.lu 1 2025-09-17 2025-09-17 ok
internal.spuerkeess.lu 1 2026-02-13 2026-02-13 ok
test.internal.spuerkeess.lu 1 2025-12-16 2025-12-16 ok
webmail.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
secmail.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
cdn.spuerkeess.lu 1 2025-12-23 2025-12-23 ok
design.spuerkeess.lu 1 2026-01-30 2026-01-30 ok
info.spuerkeess.lu 1 2025-12-23 2025-12-23 ok
vdi.pilo.spuerkeess.lu 1 2025-06-26 2025-06-26 nxdomain
pop.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
smtp.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
prod.payconiq.spuerkeess.lu 2 2025-07-02 2026-02-26 nxdomain
uat.payconiq.spuerkeess.lu 2 2025-07-02 2026-02-26 nxdomain
transfer.spuerkeess.lu 2 2026-02-23 2026-03-05 ok
traveler.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
testdeveloper.spuerkeess.lu 1 2025-09-22 2025-09-22 ok
ebics.spuerkeess.lu 1 2026-02-27 2026-02-27 nxdomain
metrics.spuerkeess.lu 2 2025-08-26 2026-04-17 ok
ssm-tls.spuerkeess.lu 1 2025-11-14 2025-11-14 nodata
access.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
testaccess.spuerkeess.lu 1 2025-09-23 2025-09-23 ok
events.spuerkeess.lu 3 2025-10-27 2026-01-30 ok
test.events.spuerkeess.lu 2 2025-10-27 2026-01-30 ok
status.spuerkeess.lu 1 2025-12-23 2025-12-23 ok
axxessnews.spuerkeess.lu 1 2025-12-23 2025-12-23 nxdomain
mftuat.spuerkeess.lu 3 2025-06-12 2026-02-26 ok
mft.spuerkeess.lu 2 2025-06-12 2026-02-26 ok
test.spuerkeess.lu 1 2025-12-23 2025-12-23 ok
expe-test.spuerkeess.lu 1 2025-10-21 2025-10-21 ok
secmail-test.spuerkeess.lu 1 2025-11-28 2025-11-28 ok
spam-test.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
my-test.spuerkeess.lu 1 2026-02-19 2026-02-19 ok
mailsrvtest.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
mxtest.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
ext.spuerkeess.lu 1 2025-11-14 2025-11-14 nodata
mailsrv.spuerkeess.lu 1 2025-11-14 2025-11-14 ok
www.spuerkeess.lu 2 2025-12-23 2026-01-20 ok
survey.spuerkeess.lu 1 2026-07-15 2026-07-15 ok
my.spuerkeess.lu 1 2026-02-25 2026-02-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/spuerkeess.lu (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/spuerkeess.lu.