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.

62 hosts · 297 ms

HostCertsFirst seenLast seenDNS
fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
*.fsapartners.ed.gov 1 2026-08-27 2026-08-27 —
service-api-osc.fsapartners.ed.gov 2 2025-12-05 2026-01-28 ok
*.apps.prod.fsapartners.ed.gov 3 2026-07-20 2026-08-20 —
console.apps.prod.fsapartners.ed.gov 3 2026-07-20 2026-08-20 nodata
oauth.apps.prod.fsapartners.ed.gov 3 2026-07-20 2026-08-20 nodata
outreach.fsapartners.ed.gov 3 2025-09-29 2026-09-21 ok
service-api.fsapartners.ed.gov 8 2025-10-15 2026-09-25 ok
system-api.fsapartners.ed.gov 2 2025-10-15 2026-04-30 nxdomain
test-fixpath-uat-system-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-uat-system-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-cct-system-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-pdt-system-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
ppo-pft-system-api.fsapartners.ed.gov 2 2025-10-15 2026-04-30 nxdomain
ppo-test-system-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
user-api.fsapartners.ed.gov 8 2025-10-15 2026-09-25 ok
test-fixpath-uat-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-uat-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-cct-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-pdt-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
ppo-pft-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
ppo-test-api.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
*.api.fsapartners.ed.gov 4 2026-04-17 2026-08-20 —
internal.api.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
cod-internal.api.fsapartners.ed.gov 3 2025-11-14 2026-01-28 nxdomain
portal.fsapartners.ed.gov 5 2026-05-21 2026-09-30 ok
mail.fsapartners.ed.gov 1 2026-08-10 2026-08-10 nxdomain
*.mail.fsapartners.ed.gov 1 2026-08-10 2026-08-10 —
origin.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
service-api-origin.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
user-origin.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
sfs-origin.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
lms-origin.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
edit-origin.fsapartners.ed.gov 3 2025-11-14 2026-01-28 ok
info.fsapartners.ed.gov 1 2026-08-10 2026-08-10 nxdomain
*.info.fsapartners.ed.gov 1 2026-08-10 2026-08-10 —
test-fixpath-uat-app.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-uat-app.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-cct-app.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-pdt-app.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
edit-app.fsapartners.ed.gov 3 2025-11-14 2026-01-28 nxdomain
mailout1.app.fsapartners.ed.gov 3 2026-03-16 2026-09-15 ok
mailout2.app.fsapartners.ed.gov 3 2026-03-16 2026-09-15 ok
mailout3.app.fsapartners.ed.gov 3 2026-03-16 2026-09-15 ok
mailout4.app.fsapartners.ed.gov 3 2026-03-16 2026-09-15 ok
sfs.fsapartners.ed.gov 8 2025-10-15 2026-09-25 ok
edit.fsapartners.ed.gov 8 2025-10-15 2026-09-25 ok
test-fixpath-uat-edit.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-uat-edit.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-cct-edit.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
test-fixpath-pdt-edit.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
ppo-pft-edit.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
ppo-test-edit.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
*.test.fsapartners.ed.gov 13 2026-04-14 2026-08-20 —
training.test.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
*.origin.test.fsapartners.ed.gov 8 2026-04-14 2026-08-20 —
test-uat-sfs.test.fsapartners.ed.gov 5 2025-10-15 2026-09-25 ok
*.apps.test.fsapartners.ed.gov 5 2026-04-28 2026-08-10 —
console-openshift-console.apps.test.fsapartners.ed.gov 5 2026-04-28 2026-08-10 nodata
oauth-openshift.apps.test.fsapartners.ed.gov 5 2026-04-28 2026-08-10 nodata
service-api-priv.fsapartners.ed.gov 1 2026-01-28 2026-01-28 ok
test-fixpath-pdt-system-api-priv.fsapartners.ed.gov 8 2026-04-14 2026-08-20 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fsapartners.ed.gov (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/fsapartners.ed.gov.