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.

50 hosts · 387 ms

HostCertsFirst seenLast seenDNS
senecalearning.com 7 2026-03-24 2026-08-26 ok
*.senecalearning.com 2 2026-03-24 2026-08-24 —
edge-1.senecalearning.com 1 2025-12-06 2025-12-06 ok
edge-2.senecalearning.com 1 2025-12-06 2025-12-06 ok
edge-3.senecalearning.com 1 2025-12-06 2025-12-06 ok
*.infra.senecalearning.com 3 2025-07-17 2026-06-15 —
*.reference.senecalearning.com 1 2025-07-11 2025-07-11 —
*.course.reference.senecalearning.com 1 2025-07-11 2025-07-11 —
edge.senecalearning.com 2 2025-08-18 2026-07-19 ok
*.edge.senecalearning.com 4 2025-06-26 2026-08-22 —
auth.oidc.edge.senecalearning.com 6 2026-05-31 2026-09-23 ok
auth.mobile.edge.senecalearning.com 4 2026-05-20 2026-09-15 ok
auth.edge.senecalearning.com 4 2026-05-20 2026-09-15 ok
*.cdn.edge.senecalearning.com 2 2025-08-14 2026-07-13 —
admin-gateway.edge.senecalearning.com 2 2025-09-20 2026-08-20 ok
staging.senecalearning.com 1 2026-01-11 2026-01-11 ok
*.staging.senecalearning.com 3 2025-09-21 2026-08-22 —
auth.oidc.staging.senecalearning.com 4 2026-05-26 2026-09-19 ok
auth.staging.senecalearning.com 5 2026-05-27 2026-09-21 ok
*.cdn.staging.senecalearning.com 2 2025-08-22 2026-07-21 —
admin-gateway.staging.senecalearning.com 2 2025-09-21 2026-08-21 ok
senequiz.ai.senecalearning.com 2 2026-05-20 2026-07-18 ok
your-school.senecalearning.com 5 2026-05-28 2026-09-25 ok
help.senecalearning.com 2 2026-03-21 2026-08-21 ok
app.senecalearning.com 2 2025-07-15 2025-11-14 ok
*.app.senecalearning.com 4 2025-07-07 2026-08-22 —
auth.oidc.app.senecalearning.com 4 2026-05-14 2026-09-08 ok
auth.mobile.app.senecalearning.com 4 2026-05-15 2026-09-06 ok
auth.app.senecalearning.com 8 2026-05-21 2026-09-14 ok
*.cdn.app.senecalearning.com 2 2025-07-11 2026-06-10 —
*.stats.app.senecalearning.com 2 2025-07-09 2026-06-08 —
www.app.senecalearning.com 2 2025-07-15 2025-11-14 ok
admin-gateway.app.senecalearning.com 2 2025-09-24 2026-08-24 ok
*.memory.app.senecalearning.com 2 2025-07-09 2026-06-08 —
school-analytics.senecalearning.com 4 2026-05-17 2026-07-31 ok
docs.senecalearning.com 1 2025-12-27 2025-12-27 ok
gerador-de-atividades.senecalearning.com 4 2026-04-10 2026-08-08 ok
generar-actividades.senecalearning.com 4 2026-04-10 2026-08-08 ok
*.dev.senecalearning.com 5 2025-07-24 2026-08-17 —
*.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.storybook.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.web-app.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.source-map-explorer.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.cypress-tests.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.unit-tests.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.playwright.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
*.senekit.branch.dev.senecalearning.com 2 2026-04-28 2026-09-28 —
admin-gateway.dev.senecalearning.com 1 2025-11-13 2025-11-13 ok
www.senecalearning.com 5 2026-04-28 2026-08-26 ok
senequiz.senecalearning.com 4 2026-04-13 2026-10-05 ok

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