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.

32 hosts · 261 ms

HostCertsFirst seenLast seenDNS
greenlight.com 19 2025-06-26 2026-09-03 ok
*.greenlight.com 19 2025-06-26 2026-09-03 —
rb0mvy52.greenlight.com 61 2026-04-29 2026-08-23 ok
cdn.qa.greenlight.com 2 2025-07-27 2026-06-27 ok
*.cdn.qa.greenlight.com 2 2025-07-27 2026-06-27 —
share.greenlight.com 5 2026-05-01 2026-08-27 ok
staging.greenlight.com 1 2026-02-18 2026-02-18 ok
*.staging.greenlight.com 1 2026-02-18 2026-02-18 —
analytics-stage.staging.greenlight.com 2 2025-07-19 2026-06-19 nxdomain
analytics-assets-stage.staging.greenlight.com 2 2025-07-19 2026-06-19 nxdomain
cdn.staging.greenlight.com 2 2025-07-27 2026-06-27 ok
*.cdn.staging.greenlight.com 2 2025-07-27 2026-06-27 —
hi.greenlight.com 1 2025-11-16 2025-11-16 ok
track.greenlight.com 1 2025-11-07 2025-11-07 ok
portal.greenlight.com 5 2026-04-25 2026-10-05 nxdomain
click.email.greenlight.com 3 2026-05-01 2026-10-01 ok
cdn.greenlight.com 2 2025-08-11 2026-07-12 ok
*.cdn.greenlight.com 2 2025-08-11 2026-07-12 —
idprotection.greenlight.com 1 2025-07-22 2025-07-22 nxdomain
slack-claude-mcp.greenlight.com 2 2026-05-20 2026-05-20 nxdomain
help.greenlight.com 6 2026-06-02 2026-09-30 ok
shop.greenlight.com 17 2026-04-14 2026-08-24 ok
device.register.greenlight.com 2 2026-03-17 2026-09-16 ok
auth.classrooms.greenlight.com 1 2026-01-22 2026-01-22 ok
apps.greenlight.com 3 2026-04-25 2026-08-23 ok
stage.apps.greenlight.com 4 2026-04-20 2026-08-16 ok
get.greenlight.com 16 2026-05-22 2026-09-17 ok
intranet.greenlight.com 5 2026-04-18 2026-09-29 nxdomain
trust.greenlight.com 10 2026-05-29 2026-09-25 ok
cdn.dev.greenlight.com 2 2025-07-28 2026-06-28 ok
*.cdn.dev.greenlight.com 2 2025-07-28 2026-06-28 —
privacy.greenlight.com 2 2025-08-03 2026-07-04 ok

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