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.

61 hosts · 390 ms

HostCertsFirst seenLast seenDNS
ecu.org 8 2025-06-29 2026-07-01 ok
*.ecu.org 5 2025-06-29 2026-07-01 —
bizchextst1.ecu.org 4 2025-07-30 2026-07-30 nxdomain
www.bizchextst1.ecu.org 4 2025-07-30 2026-07-30 nxdomain
rpremote02.ecu.org 2 2026-02-01 2026-02-02 ok
www.rpremote02.ecu.org 2 2026-02-01 2026-02-02 nxdomain
duffive9.ecu.org 2 2025-11-12 2025-12-16 ok
www.duffive9.ecu.org 2 2025-11-12 2025-12-16 nxdomain
rpfive9.ecu.org 5 2025-10-08 2026-10-05 ok
www.rpfive9.ecu.org 5 2025-10-08 2026-10-05 nxdomain
prod-web.ecu.org 12 2026-06-01 2026-09-27 ok
cubusweb.ecu.org 16 2025-09-27 2026-09-25 ok
www.cubusweb.ecu.org 4 2025-09-27 2026-09-25 nxdomain
testcubusweb.ecu.org 15 2025-12-10 2026-10-01 ok
www.testcubusweb.ecu.org 3 2025-12-10 2026-07-20 nxdomain
rdc.ecu.org 3 2025-09-27 2026-09-10 ok
www.rdc.ecu.org 3 2025-09-27 2026-09-10 nxdomain
scim1password.ecu.org 4 2026-01-25 2026-09-12 ok
secure.ecu.org 2 2025-10-03 2025-11-03 ok
www.secure.ecu.org 2 2025-10-03 2025-11-03 nxdomain
dfremote.ecu.org 2 2025-10-06 2026-10-07 ok
www.dfremote.ecu.org 2 2025-10-06 2026-10-07 nxdomain
rpremote.ecu.org 1 2025-10-15 2025-10-15 ok
www.rpremote.ecu.org 1 2025-10-15 2025-10-15 nxdomain
staging.ecu.org 2 2025-06-24 2026-06-25 ok
www.staging.ecu.org 2 2025-06-24 2026-06-25 nxdomain
webmail.ecu.org 1 2026-04-23 2026-04-23 ok
www.webmail.ecu.org 1 2026-04-23 2026-04-23 nxdomain
email.ecu.org 6 2025-08-20 2026-09-03 ok
www.email.ecu.org 6 2025-08-20 2026-09-03 nxdomain
ap.ecu.org 15 2026-04-09 2026-10-06 ok
www.ap.ecu.org 3 2026-04-09 2026-10-06 nxdomain
autodiscover.ecu.org 1 2026-02-04 2026-02-04 ok
clservices.ecu.org 1 2026-05-22 2026-05-22 ok
www.clservices.ecu.org 1 2026-05-22 2026-05-22 nxdomain
tools.ecu.org 5 2025-08-29 2026-09-12 ok
www.tools.ecu.org 5 2025-08-29 2026-09-12 nxdomain
loans.ecu.org 4 2025-08-15 2026-08-15 ok
www.loans.ecu.org 4 2025-08-15 2026-08-15 nxdomain
estatements.ecu.org 2 2026-09-17 2026-09-17 nodata
cunexus.ecu.org 6 2025-11-02 2026-05-18 nxdomain
www.cunexus.ecu.org 2 2025-11-02 2025-11-05 nxdomain
enews.ecu.org 1 2026-01-21 2026-01-21 ok
test.ecu.org 9 2026-05-31 2026-09-26 ok
cubuswebtest.ecu.org 1 2025-09-19 2025-09-19 nxdomain
www.cubuswebtest.ecu.org 1 2025-09-19 2025-09-19 nxdomain
emailtest.ecu.org 1 2026-02-04 2026-02-04 nxdomain
cunexustest.ecu.org 4 2025-11-02 2026-05-18 nxdomain
www.cunexustest.ecu.org 2 2025-11-02 2025-11-05 nxdomain
text.ecu.org 1 2025-10-28 2025-10-28 ok
apdev.ecu.org 15 2025-10-03 2026-09-30 ok
www.apdev.ecu.org 2 2025-10-03 2026-09-29 nxdomain
ritv.ecu.org 12 2025-09-18 2026-09-19 ok
www.ritv.ecu.org 3 2025-09-18 2026-09-19 nxdomain
www.ecu.org 11 2025-11-21 2026-08-12 ok
bizchex.ecu.org 1 2025-12-20 2025-12-20 nxdomain
www.bizchex.ecu.org 1 2025-12-20 2025-12-20 nxdomain
email.standby.ecu.org 5 2025-08-20 2026-09-03 nxdomain
survey.ecu.org 6 2026-04-26 2026-08-22 ok
apply.ecu.org 2 2026-01-05 2026-02-09 ok
www.apply.ecu.org 2 2026-01-05 2026-02-09 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/ecu.org (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/ecu.org.