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) · 285 ms

HostCertsFirst seenLast seenDNS
qa-us-east-1-splunk-heavy-forwarder-1.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
uat-us-east-1-splunk-heavy-forwarder-1.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
dev-us-east-1-splunk-heavy-forwarder-1.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
patqa.api.cc-pod1.infra.marcus.com 2 2026-05-06 2026-06-09 nxdomain
*.patqa.api.cc-pod1.infra.marcus.com 2 2026-05-06 2026-06-09 —
prod.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod-blue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
coreissue-blue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
wcf-blue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
services-blue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
corecredit-blue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
report-blue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
coreissue.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
wcf.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
perf.api.cc-pod1.infra.marcus.com 2 2026-05-06 2026-06-09 nxdomain
*.perf.api.cc-pod1.infra.marcus.com 2 2026-05-06 2026-06-09 —
prod-green.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
coreissue-green.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
wcf-green.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
services-green.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
corecredit-green.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
report-green.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
services.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
patuat.api.cc-pod1.infra.marcus.com 2 2026-05-06 2026-06-09 nxdomain
*.patuat.api.cc-pod1.infra.marcus.com 2 2026-05-06 2026-06-09 —
corecredit.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
report.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod.east.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod-blue.east.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod-green.east.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod.west.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod-blue.west.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
prod-green.west.api.cc-pod1.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
corecredit.cc-pod1.infra.marcus.com 3 2026-06-30 2026-07-01 nxdomain
patqa.corecredit.cc-pod1.infra.marcus.com 1 2026-05-06 2026-05-06 ok
perf.corecredit.cc-pod1.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
patuat.corecredit.cc-pod1.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
qa-us-east-1-splunk-heavy-forwarder-2.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
uat-us-east-1-splunk-heavy-forwarder-2.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
dev-us-east-1-splunk-heavy-forwarder-2.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
qa.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.qa.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
patqa.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.patqa.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
prod.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod-blue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
coreissue-blue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
wcf-blue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
services-blue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
corecredit-blue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
report-blue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
coreissue.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
wcf.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
perf.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.perf.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
prod-green.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
coreissue-green.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
wcf-green.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
services-green.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
corecredit-green.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
report-green.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
train.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.train.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
services.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
uat.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.uat.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
patuat.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.patuat.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
corecredit.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
report.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod.east.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod-blue.east.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod-green.east.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod.west.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod-blue.west.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
prod-green.west.api.cc-pod2.infra.marcus.com 1 2025-10-03 2025-10-03 nxdomain
dev.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 nxdomain
*.dev.api.cc-pod2.infra.marcus.com 3 2026-02-27 2026-06-09 —
corecredit.cc-pod2.infra.marcus.com 4 2025-07-21 2026-07-01 ok
qa.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
patqa.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
prod.corecredit.cc-pod2.infra.marcus.com 1 2026-06-30 2026-06-30 nxdomain
perf.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 ok
train.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
uat.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
patuat.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 ok
dev.corecredit.cc-pod2.infra.marcus.com 1 2026-05-06 2026-05-06 nxdomain
qa-us-east-1-splunk-heavy-forwarder-3.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
uat-us-east-1-splunk-heavy-forwarder-3.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
dev-us-east-1-splunk-heavy-forwarder-3.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
corecredit.cc-pod3.infra.marcus.com 1 2025-07-21 2025-07-21 nxdomain
qa-us-east-1-splunk-heavy-forwarder-4.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
uat-us-east-1-splunk-heavy-forwarder-4.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
dev-us-east-1-splunk-heavy-forwarder-4.infra.marcus.com 1 2026-03-09 2026-03-09 nxdomain
prod.api.cc-pod4.infra.marcus.com 1 2025-10-04 2025-10-04 nxdomain
prod-blue.api.cc-pod4.infra.marcus.com 1 2025-10-04 2025-10-04 nxdomain
coreissue-blue.api.cc-pod4.infra.marcus.com 1 2025-10-04 2025-10-04 nxdomain
wcf-blue.api.cc-pod4.infra.marcus.com 1 2025-10-04 2025-10-04 nxdomain
services-blue.api.cc-pod4.infra.marcus.com 1 2025-10-04 2025-10-04 nxdomain
corecredit-blue.api.cc-pod4.infra.marcus.com 1 2025-10-04 2025-10-04 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/marcus.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/marcus.com.