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 · 411 ms

HostCertsFirst seenLast seenDNS
justetf.com 3 2026-05-01 2026-10-01 ok
beta1.justetf.com 1 2026-02-11 2026-02-11 nxdomain
prod1.justetf.com 2 2026-04-10 2026-09-10 ok
reference1.justetf.com 3 2026-03-23 2026-08-23 ok
beta2.justetf.com 2 2025-08-25 2026-07-26 nxdomain
prod2.justetf.com 2 2026-04-10 2026-09-10 ok
newsletter2.justetf.com 5 2026-03-12 2026-10-02 ok
test2.justetf.com 3 2026-03-27 2026-08-27 ok
data.test2.justetf.com 2 2025-08-14 2026-07-15 ok
payone.test2.justetf.com 2 2025-07-17 2026-06-16 ok
stripe.test2.justetf.com 2 2025-10-22 2026-09-21 ok
api.test2.justetf.com 2 2026-03-05 2026-07-21 ok
beta3.justetf.com 1 2026-01-08 2026-01-08 nxdomain
prod3.justetf.com 2 2025-09-09 2026-08-10 ok
qp3.justetf.com 1 2026-01-01 2026-01-01 ok
test3.justetf.com 1 2025-12-10 2025-12-10 ok
beta4.justetf.com 1 2026-02-17 2026-02-17 ok
test4.justetf.com 1 2026-01-14 2026-01-14 ok
stripe.test4.justetf.com 2 2026-04-21 2026-09-21 ok
test5.justetf.com 2 2026-04-06 2026-09-06 ok
stripe.test5.justetf.com 2 2026-05-02 2026-10-02 ok
test6.justetf.com 1 2025-12-11 2025-12-11 ok
monitoring.grafana.justetf.com 6 2026-08-18 2026-08-18 ok
data.justetf.com 2 2025-09-05 2026-08-05 ok
api.mobile.stock-data.justetf.com 2 2025-09-09 2026-08-10 ok
api.mobile.develop.stock-data.justetf.com 1 2026-02-19 2026-02-19 ok
api.mobile.test.stock-data.justetf.com 2 2025-09-07 2026-08-08 ok
api.mobile.sandbox.stock-data.justetf.com 1 2026-02-19 2026-02-19 ok
test.data.justetf.com 2 2025-09-01 2026-08-02 ok
prod2b.justetf.com 1 2026-02-03 2026-02-03 ok
prod3b.justetf.com 2 2026-03-08 2026-07-24 ok
api.web.justetf.com 1 2026-02-05 2026-02-05 ok
batch.dashboard.justetf.com 2 2026-08-14 2026-08-14 nxdomain
sonarqube.justetf.com 3 2026-04-16 2026-09-16 ok
api.mobile.justetf.com 1 2026-02-01 2026-02-01 ok
stripe.justetf.com 2 2025-10-22 2026-09-21 ok
feature.justetf.com 3 2026-03-25 2026-08-25 ok
staging.justetf.com 3 2026-03-22 2026-08-22 ok
testautomation.webui.justetf.com 1 2026-07-07 2026-07-07 ok
storybook.justetf.com 1 2025-12-04 2025-12-04 ok
*.storybook.justetf.com 1 2025-12-04 2025-12-04 —
cdn.justetf.com 3 2026-04-13 2026-09-13 ok
vpn.justetf.com 1 2026-01-29 2026-01-29 ok
develop.justetf.com 3 2026-03-22 2026-08-22 ok
api.web.develop.justetf.com 2 2026-02-22 2026-07-10 ok
api.mobile.develop.justetf.com 1 2026-02-11 2026-02-11 ok
app.justetf.com 1 2026-01-27 2026-01-27 ok
test4.app.justetf.com 2 2026-04-08 2026-09-08 ok
test.app.justetf.com 2 2026-04-08 2026-09-08 ok
batch.container.justetf.com 2 2026-08-14 2026-08-14 ok
images.justetf.com 1 2026-05-22 2026-05-22 nxdomain
api.mobile.stock-data-subscriptions.justetf.com 2 2025-09-09 2026-08-10 ok
api.mobile.develop.stock-data-subscriptions.justetf.com 1 2026-02-19 2026-02-19 ok
api.mobile.test.stock-data-subscriptions.justetf.com 2 2025-07-28 2026-06-28 ok
api.mobile.sandbox.stock-data-subscriptions.justetf.com 1 2026-02-19 2026-02-19 ok
monitoring.status.justetf.com 2 2026-02-25 2026-07-13 ok
testautomation.status.justetf.com 1 2026-07-06 2026-07-06 nxdomain
api.web.test.justetf.com 1 2026-02-05 2026-02-05 ok
api.mobile.test.justetf.com 1 2026-02-01 2026-02-01 ok
sst.justetf.com 1 2025-12-21 2025-12-21 ok
www.justetf.com 3 2026-05-01 2026-10-01 ok
sandbox.justetf.com 2 2026-04-02 2026-09-02 ok
api.web.sandbox.justetf.com 2 2026-02-22 2026-07-10 ok
api.mobile.sandbox.justetf.com 1 2026-02-11 2026-02-11 ok
deploy.justetf.com 1 2026-09-29 2026-09-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/justetf.com (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/justetf.com.