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.

27 hosts · 297 ms

HostCertsFirst seenLast seenDNS
ledn.io 12 2026-03-03 2026-08-10 ok
*.ledn.io 2 2026-03-03 2026-07-19 —
qa.ledn.io 2 2025-12-07 2026-02-10 ok
platform-qa.ledn.io 2 2025-07-18 2026-06-17 ok
*.qa.ledn.io 2 2025-12-07 2026-02-10 —
atlantisinfra.ssvc.ledn.io 2 2025-07-31 2026-07-01 ok
prod.ledn.io 3 2025-12-08 2026-07-18 nodata
*.prod.ledn.io 3 2025-12-08 2026-07-18 —
mortgage.ledn.io 14 2026-04-13 2026-08-10 ok
blog.ledn.io 12 2026-04-13 2026-10-07 ok
qa-api.ledn.io 2 2025-09-09 2026-08-09 ok
dev-api.ledn.io 2 2025-08-17 2026-07-16 ok
learn.ledn.io 10 2026-06-05 2026-10-02 ok
help.ledn.io 5 2026-05-30 2026-09-27 ok
clicks.comms.ledn.io 2 2026-03-04 2026-07-20 ok
forms.ledn.io 15 2026-06-04 2026-09-30 ok
status.ledn.io 2 2025-06-11 2026-05-12 ok
encrypt.ledn.io 5 2026-04-24 2026-08-22 ok
clicks.support.ledn.io 2 2026-03-04 2026-07-20 ok
trust.ledn.io 12 2026-05-26 2026-09-21 ok
dev.ledn.io 2 2025-12-04 2026-02-15 ok
platform-dev.ledn.io 2 2026-04-03 2026-09-03 ok
*.dev.ledn.io 2 2025-12-04 2026-02-15 —
preview.ledn.io 1 2025-12-30 2025-12-30 ok
*.preview.ledn.io 1 2025-12-30 2025-12-30 —
www.ledn.io 12 2026-04-13 2026-10-07 ok
try.ledn.io 10 2026-05-03 2026-08-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ledn.io (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/ledn.io.