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) · 514 ms

HostCertsFirst seenLast seenDNS
x.com 91 2026-04-22 2026-10-04 ok
*.x.com 91 2026-04-22 2026-10-04 —
realm-cloud1.x.com 4 2026-05-27 2026-09-15 ok
www.realm-cloud1.x.com 3 2026-05-26 2026-09-12 ok
*.smf1.x.com 53 2026-04-11 2026-10-03 —
money-dev1.x.com 3 2025-07-23 2026-06-23 nodata
karma.money-dev1.x.com 1 2025-09-18 2025-09-18 nxdomain
grafana.money-dev1.x.com 1 2025-09-18 2025-09-18 nxdomain
data.money-dev1.x.com 1 2026-01-02 2026-01-02 nxdomain
web-api.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
mobile-api.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
admin.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
webhooks.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
karma.money-dev.money-dev1.x.com 1 2025-09-18 2025-09-18 nxdomain
grafana.money-dev.money-dev1.x.com 1 2025-09-18 2025-09-18 nxdomain
data.money-dev.money-dev1.x.com 1 2026-01-02 2026-01-02 nxdomain
web-api.money-dev.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
mobile-api.money-dev.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
admin.money-dev.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
webhooks.money-dev.money-dev1.x.com 1 2025-06-26 2025-06-26 nxdomain
pushgateway.money-dev.money-dev1.x.com 1 2025-10-02 2025-10-02 nxdomain
pushgateway.money-dev1.x.com 1 2025-10-02 2025-10-02 nxdomain
money-dev2.x.com 3 2025-07-23 2026-06-23 nodata
karma.money-dev2.x.com 1 2025-09-18 2025-09-18 nxdomain
grafana.money-dev2.x.com 1 2025-09-18 2025-09-18 nxdomain
data.money-dev2.x.com 1 2026-01-02 2026-01-02 nxdomain
web-api.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
mobile-api.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
admin.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
webhooks.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
karma.money-dev.money-dev2.x.com 1 2025-09-18 2025-09-18 nxdomain
grafana.money-dev.money-dev2.x.com 1 2025-09-18 2025-09-18 nxdomain
data.money-dev.money-dev2.x.com 1 2026-01-02 2026-01-02 nxdomain
web-api.money-dev.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
mobile-api.money-dev.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
admin.money-dev.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
webhooks.money-dev.money-dev2.x.com 1 2025-06-26 2025-06-26 nxdomain
pushgateway.money-dev.money-dev2.x.com 1 2025-10-02 2025-10-02 nxdomain
pushgateway.money-dev2.x.com 1 2025-10-02 2025-10-02 nxdomain
money-dev3.x.com 3 2025-07-23 2026-06-23 nodata
karma.money-dev3.x.com 1 2025-09-18 2025-09-18 nxdomain
grafana.money-dev3.x.com 1 2025-09-18 2025-09-18 nxdomain
data.money-dev3.x.com 1 2026-01-02 2026-01-02 nxdomain
web-api.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
mobile-api.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
admin.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
webhooks.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
karma.money-dev.money-dev3.x.com 1 2025-09-18 2025-09-18 nxdomain
grafana.money-dev.money-dev3.x.com 1 2025-09-18 2025-09-18 nxdomain
data.money-dev.money-dev3.x.com 1 2026-01-02 2026-01-02 nxdomain
web-api.money-dev.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
mobile-api.money-dev.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
admin.money-dev.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
webhooks.money-dev.money-dev3.x.com 1 2025-06-26 2025-06-26 nxdomain
pushgateway.money-dev.money-dev3.x.com 1 2025-10-02 2025-10-02 nxdomain
pushgateway.money-dev3.x.com 1 2025-10-02 2025-10-02 nxdomain
mx3.x.com 12 2026-04-15 2026-08-28 ok
mx4.x.com 12 2026-04-15 2026-08-28 ok
upload-a.x.com 16 2026-05-22 2026-09-17 ok
realm-a.x.com 2 2026-03-05 2026-07-21 ok
*.atla.x.com 53 2026-04-11 2026-10-03 —
*.pdxa.x.com 53 2026-04-11 2026-10-03 —
realm-b.x.com 2 2026-03-03 2026-07-19 ok
terafab.x.com 10 2026-05-19 2026-09-14 ok
tdweb.x.com 37 2026-04-12 2026-10-06 nxdomain
upload.x.com 26 2026-04-16 2026-10-05 ok
click.send.x.com 14 2026-05-19 2026-10-02 ok
payments-prod.x.com 4 2025-11-12 2026-02-02 nodata
karma.payments-prod.x.com 1 2025-09-22 2025-09-22 nxdomain
grafana.payments-prod.x.com 1 2025-09-22 2025-09-22 nxdomain
data.payments-prod.x.com 2 2026-01-13 2026-01-13 nxdomain
web-api.payments-prod.x.com 2 2025-09-08 2026-05-06 nodata
mobile-api.payments-prod.x.com 2 2025-09-08 2026-05-06 nodata
sdn.payments-prod.x.com 5 2026-04-23 2026-10-03 ok
admin.payments-prod.x.com 1 2026-02-25 2026-02-25 nodata
p.payments-prod.x.com 7 2026-05-02 2026-09-14 ok
webhooks.payments-prod.x.com 2 2025-09-08 2026-03-04 nodata
pushgateway.payments-prod.x.com 1 2025-10-02 2025-10-02 nxdomain
td.x.com 37 2026-04-12 2026-10-06 ok
mobile.x.com 37 2026-04-11 2026-10-03 ok
karma.prod.unute.x.com 1 2025-12-08 2025-12-08 ok
argocd.prod.unute.x.com 2 2026-04-26 2026-09-26 ok
argocd-internal.prod.unute.x.com 2 2026-04-26 2026-09-26 nxdomain
secmon.prod.unute.x.com 3 2025-09-22 2026-08-23 ok
dfir-iris.prod.unute.x.com 1 2025-09-03 2025-09-03 nxdomain
wz.prod.unute.x.com 2 2026-04-26 2026-09-26 ok
karma.staging.unute.x.com 1 2025-12-06 2025-12-06 ok
argocd.staging.unute.x.com 3 2026-04-25 2026-09-25 ok
argocd-internal.staging.unute.x.com 2 2026-04-25 2026-09-25 nxdomain
secmon.staging.unute.x.com 3 2025-09-22 2026-08-23 ok
dfir-iris.staging.unute.x.com 1 2025-08-28 2025-08-28 nxdomain
wz.staging.unute.x.com 2 2026-04-25 2026-09-25 ok
karma.dev.unute.x.com 1 2025-12-04 2025-12-04 nodata
argocd.dev.unute.x.com 1 2026-04-23 2026-04-23 nodata
argocd-internal.dev.unute.x.com 1 2026-04-23 2026-04-23 nxdomain
secmon.dev.unute.x.com 1 2025-09-19 2025-09-19 nodata
dfir-iris.dev.unute.x.com 1 2025-08-27 2025-08-27 nodata
*.live.x.com 24 2026-04-28 2026-09-28 —
payments-staging.x.com 4 2025-11-06 2026-02-02 nodata
karma.payments-staging.x.com 1 2025-09-22 2025-09-22 nxdomain

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/x.com.

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/x.com.