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.

100 hosts (first page) · 501 ms

HostCertsFirst seenLast seenDNS
ek.co 23 2026-01-23 2026-09-24 ok
*.ek.co 18 2026-01-23 2026-05-21 —
ukpm-vspc001.ek.co 5 2026-05-25 2026-09-23 ok
portal-dev02.ek.co 5 2026-05-05 2026-09-02 ok
control2.ek.co 2 2025-11-10 2025-11-10 ok
portal-dev04.ek.co 5 2026-05-05 2026-09-02 ok
gitlab.ek.co 5 2026-05-05 2026-09-02 ok
c2c.ek.co 5 2026-05-17 2026-09-14 ok
citadel.nmc.ek.co 1 2026-01-20 2026-01-20 nodata
*.citadel.nmc.ek.co 1 2026-01-20 2026-01-20 —
mgt.nmc.ek.co 1 2026-01-20 2026-01-20 nodata
*.mgt.nmc.ek.co 1 2026-01-20 2026-01-20 —
nocmx.mgt.nmc.ek.co 4 2026-06-06 2026-10-04 ok
nocmx.nmc.ek.co 4 2026-06-06 2026-10-04 ok
shield.ek.co 9 2026-04-16 2026-10-07 ok
internalold.ek.co 2 2026-08-13 2026-08-13 ok
sphere-backend.ek.co 4 2026-04-15 2026-09-02 ok
ie.cloud.ek.co 1 2026-06-05 2026-06-05 nodata
*.ie.cloud.ek.co 1 2026-06-05 2026-06-05 —
vpn1.ie.cloud.ek.co 8 2026-04-26 2026-10-01 ok
asn01.dub2.ie.cloud.ek.co 5 2026-05-15 2026-09-12 ok
gdapvpn.ie.cloud.ek.co 4 2026-04-12 2026-08-10 ok
musgrave-rdr.ie.cloud.ek.co 7 2026-05-05 2026-08-27 ok
smtp-relay.ie.cloud.ek.co 5 2026-04-25 2026-08-24 ok
uk.cloud.ek.co 2 2026-04-16 2026-10-06 nodata
*.uk.cloud.ek.co 2 2026-04-16 2026-10-06 —
itsm-auto-01.uk.cloud.ek.co 2 2025-12-19 2026-04-17 ok
www.itsm-auto-01.uk.cloud.ek.co 2 2025-12-19 2026-04-17 nxdomain
tsc.uk.cloud.ek.co 4 2026-04-12 2026-09-11 ok
clarioneurope.uk.cloud.ek.co 6 2026-04-25 2026-10-07 ok
rurb-rdg.uk.cloud.ek.co 3 2026-06-19 2026-08-14 ok
tsc-rdg.uk.cloud.ek.co 4 2026-04-12 2026-09-11 ok
clarioneurope-rdg.uk.cloud.ek.co 6 2026-04-25 2026-10-07 ok
clarioneurope-vpn.uk.cloud.ek.co 3 2026-07-22 2026-09-20 ok
london-vpn.uk.cloud.ek.co 1 2025-07-01 2025-07-01 ok
www.london-vpn.uk.cloud.ek.co 1 2025-07-01 2025-07-01 nxdomain
lhhdev1-gateway.uk.cloud.ek.co 5 2026-05-03 2026-08-21 ok
*.nl.cloud.ek.co 1 2025-07-27 2025-07-27 —
vcd-01.nl.cloud.ek.co 1 2026-07-01 2026-07-01 ok
vsp-01.nl.cloud.ek.co 1 2026-09-03 2026-09-03 ok
test123.nl.cloud.ek.co 2 2026-09-01 2026-09-01 nxdomain
oena.nl.cloud.ek.co 2 2026-02-09 2026-07-04 ok
naming.nl.cloud.ek.co 2 2026-03-01 2026-06-24 ok
appregistrar.nl.cloud.ek.co 2 2026-03-01 2026-06-25 ok
cs.nl.cloud.ek.co 3 2026-03-25 2026-08-07 ok
liquit.nl.cloud.ek.co 1 2026-01-15 2026-01-15 nodata
*.liquit.nl.cloud.ek.co 3 2026-01-15 2026-09-16 —
acceptance1.liquit.nl.cloud.ek.co 1 2026-09-16 2026-09-16 ok
accpetance2.liquit.nl.cloud.ek.co 1 2026-09-16 2026-09-16 ok
acceptance3.liquit.nl.cloud.ek.co 1 2026-09-16 2026-09-16 ok
acceptance4.liquit.nl.cloud.ek.co 1 2026-09-16 2026-09-16 ok
accept7.liquit.nl.cloud.ek.co 1 2026-09-16 2026-09-16 ok
accpt8.liquit.nl.cloud.ek.co 1 2026-09-16 2026-09-16 ok
accpet9.liquit.nl.cloud.ek.co 3 2026-09-16 2026-09-16 ok
acceptance.liquit.nl.cloud.ek.co 5 2026-07-02 2026-09-16 ok
itonaccpt.liquit.nl.cloud.ek.co 3 2026-07-03 2026-09-16 ok
klant.nl.cloud.ek.co 1 2026-07-09 2026-07-09 ok
smtp01.ist.cloud.ek.co 5 2026-05-12 2026-09-09 ok
workspace.ek.co 5 2026-04-26 2026-08-22 ok
connectwise-ie.ek.co 1 2025-11-27 2025-11-27 ok
www.connectwise-ie.ek.co 1 2025-11-27 2025-11-27 nxdomain
sphere.ek.co 4 2026-04-15 2026-09-02 ok
ip4-detect.sphere.ek.co 5 2026-05-10 2026-09-07 ok
ip6-detect.sphere.ek.co 5 2026-05-10 2026-09-07 nodata
accept.sphere.ek.co 4 2026-04-15 2026-09-02 ok
dev1.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
dev1-be.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
uat-be.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
accept-be.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
b2ctest-be.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
next-be.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
login.test.sphere.ek.co 5 2026-05-06 2026-09-15 ok
uat.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
redirect.test.sphere.ek.co 5 2026-05-07 2026-09-04 ok
ip4-detect.test.sphere.ek.co 5 2026-05-10 2026-09-07 ok
ip6-detect.test.sphere.ek.co 5 2026-05-10 2026-09-07 nodata
b2ctest.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
next.test.sphere.ek.co 4 2026-04-15 2026-09-02 ok
core.ek.co 5 2026-04-26 2026-08-22 ok
cloudhouse.ek.co 1 2026-05-27 2026-05-27 ok
lighthouse.ek.co 6 2025-07-21 2026-09-07 ok
remote.ek.co 1 2026-07-30 2026-07-30 ok
www.remote.ek.co 1 2026-07-30 2026-07-30 nxdomain
link.ek.co 5 2026-05-20 2026-09-17 ok
klantportaal.ek.co 2 2026-08-21 2026-08-21 ok
internal.ek.co 11 2026-05-31 2026-09-08 ok
lighthouse-external.ek.co 1 2025-08-04 2025-08-04 nodata
www.lighthouse-external.ek.co 1 2025-08-04 2025-08-04 nxdomain
portal.ek.co 5 2026-05-09 2026-09-06 ok
sdportal.ek.co 5 2026-05-11 2026-08-18 ok
control.ek.co 2 2025-11-10 2025-11-10 ok
login.ek.co 5 2026-04-09 2026-08-20 ok
on.ek.co 5 2026-05-17 2026-09-14 nodata
*.on.ek.co 5 2026-05-17 2026-09-14 —
gereserveerd.on.ek.co 5 2026-04-29 2026-08-27 ok
forsale.on.ek.co 5 2026-05-07 2026-09-04 ok
wiki.on.ek.co 3 2026-06-18 2026-08-17 ok
filetransfer.on.ek.co 7 2026-04-27 2026-09-09 ok
go.ek.co 13 2026-04-17 2026-08-14 ok
halo.ek.co 3 2026-06-02 2026-09-08 ok

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/ek.co.

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/ek.co.