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.

79 hosts · 261 ms

HostCertsFirst seenLast seenDNS
tomo.com 4 2025-10-02 2026-09-02 ok
*.tomo.com 4 2025-10-02 2026-09-02 —
*.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.blue.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.bff.blue.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.admin.blue.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.proxy.blue.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.green.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.bff.green.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.admin.green.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.proxy.green.use1.tomo.com 2 2025-10-02 2026-09-02 —
*.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.blue.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.bff.blue.usw2.tomo.com 4 2025-10-02 2026-09-02 —
dispatch.blue.usw2.tomo.com 1 2026-09-16 2026-09-16 ok
api.blue.usw2.tomo.com 1 2026-09-23 2026-09-23 ok
*.internal.blue.usw2.tomo.com 2 2025-10-02 2026-09-02 —
*.admin.blue.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.proxy.blue.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.green.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.bff.green.usw2.tomo.com 4 2025-10-02 2026-09-02 —
dispatch.green.usw2.tomo.com 1 2026-09-16 2026-09-16 ok
api.green.usw2.tomo.com 1 2026-09-23 2026-09-23 ok
*.internal.green.usw2.tomo.com 2 2025-10-02 2026-09-02 —
*.admin.green.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.proxy.green.usw2.tomo.com 4 2025-10-02 2026-09-02 —
*.bff.tomo.com 4 2025-10-02 2026-09-02 —
staging.tomo.com 5 2025-07-01 2026-09-28 ok
*.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.blue.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.bff.blue.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.admin.blue.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.proxy.blue.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.green.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.bff.green.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.admin.green.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.proxy.green.use1.staging.tomo.com 3 2025-07-01 2026-06-01 —
*.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.blue.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.bff.blue.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
dispatch.blue.usw2.staging.tomo.com 2 2026-09-16 2026-09-16 ok
*.dispatch.blue.usw2.staging.tomo.com 2 2026-09-16 2026-09-16 —
api.blue.usw2.staging.tomo.com 3 2026-09-23 2026-09-23 ok
*.api.blue.usw2.staging.tomo.com 3 2026-09-23 2026-09-23 —
*.internal.blue.usw2.staging.tomo.com 2 2025-10-28 2026-09-28 —
*.admin.blue.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.s.blue.usw2.staging.tomo.com 2 2025-10-28 2026-09-28 —
*.proxy.blue.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.green.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.bff.green.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
dispatch.green.usw2.staging.tomo.com 2 2026-09-16 2026-09-16 ok
*.dispatch.green.usw2.staging.tomo.com 2 2026-09-16 2026-09-16 —
api.green.usw2.staging.tomo.com 3 2026-09-23 2026-09-23 ok
*.api.green.usw2.staging.tomo.com 3 2026-09-23 2026-09-23 —
*.internal.green.usw2.staging.tomo.com 2 2025-10-28 2026-09-28 —
*.admin.green.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.s.green.usw2.staging.tomo.com 2 2025-10-28 2026-09-28 —
*.proxy.green.usw2.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.bff.staging.tomo.com 5 2025-07-01 2026-09-28 —
dispatch.staging.tomo.com 2 2026-09-16 2026-09-16 ok
*.dispatch.staging.tomo.com 2 2026-09-16 2026-09-16 —
auth.staging.tomo.com 1 2026-09-23 2026-09-23 ok
api.staging.tomo.com 3 2026-09-23 2026-09-23 ok
*.api.staging.tomo.com 3 2026-09-23 2026-09-23 —
*.internal.staging.tomo.com 2 2025-10-28 2026-09-28 —
*.admin.staging.tomo.com 5 2025-07-01 2026-09-28 —
*.s.staging.tomo.com 2 2025-10-28 2026-09-28 —
proxy.staging.tomo.com 1 2026-07-30 2026-07-30 ok
*.proxy.staging.tomo.com 6 2025-07-01 2026-09-28 —
dispatch.tomo.com 1 2026-09-16 2026-09-16 ok
auth.tomo.com 1 2026-09-29 2026-09-29 ok
api.tomo.com 1 2026-09-23 2026-09-23 ok
*.internal.tomo.com 2 2025-10-02 2026-09-02 —
*.admin.tomo.com 4 2025-10-02 2026-09-02 —
go.tomo.com 11 2026-05-22 2026-09-17 ok
analytics.tomo.com 3 2026-04-27 2026-08-15 ok
proxy.tomo.com 1 2025-11-30 2025-11-30 ok
*.proxy.tomo.com 5 2025-10-02 2026-09-02 —

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