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.

12 hosts · 262 ms

HostCertsFirst seenLast seenDNS
ledger.fr 8 2026-05-10 2026-09-29 ok
*.ledger.fr 8 2026-05-10 2026-09-29 —
sonarqube.donjon.ledger.fr 3 2026-04-14 2026-07-15 ok
git.donjon.ledger.fr 3 2026-04-14 2026-07-15 ok
mta-sts.ledger.fr 6 2026-05-04 2026-08-30 ok
slackbot.staging.aws.ledger.fr 4 2026-04-16 2026-08-14 ok
retailbot.staging.aws.ledger.fr 5 2026-04-12 2026-08-15 ok
knowlbot.staging.aws.ledger.fr 3 2026-04-16 2026-06-15 ok
categorybot.staging.aws.ledger.fr 4 2026-04-17 2026-08-15 ok
jira-issues-proxy.staging.aws.ledger.fr 5 2026-05-23 2026-09-20 ok
jira-incident-proxy.staging.aws.ledger.fr 5 2026-06-05 2026-10-03 ok
pwdmgt.ledger.fr 1 2026-04-17 2026-04-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ledger.fr (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/ledger.fr.