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.

13 hosts · 410 ms

HostCertsFirst seenLast seenDNS
greenlight.me 5 2025-10-03 2026-09-02 ok
*.greenlight.me 29 2025-07-17 2026-09-22 —
mcp-luna.greenlight.me 1 2026-06-04 2026-06-04 ok
clientoauth.greenlight.me 1 2025-10-23 2025-10-23 nxdomain
prod.clientauth.greenlight.me 1 2025-10-23 2025-10-23 nxdomain
portal.greenlight.me 5 2026-04-23 2026-10-05 ok
click.email.greenlight.me 2 2026-03-18 2026-08-18 ok
links.email.greenlight.me 3 2026-06-19 2026-09-03 ok
slack-claude-mcp.greenlight.me 3 2026-05-20 2026-09-06 ok
autokeep.greenlight.me 20 2026-04-30 2026-09-01 ok
iris.greenlight.me 1 2026-08-13 2026-08-13 ok
intranet.greenlight.me 5 2026-04-26 2026-10-02 ok
support.greenlight.me 1 2025-11-11 2025-11-11 nxdomain

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