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.

16 hosts · 311 ms

HostCertsFirst seenLast seenDNS
matisse.fr 5 2026-05-13 2026-09-10 ok
wa.matisse.fr 5 2026-04-30 2026-08-28 ok
link-preprod.matisse.fr 3 2026-07-26 2026-09-24 ok
fse.matisse.fr 1 2026-08-04 2026-08-04 ok
mta-sts.fse.matisse.fr 2 2026-08-04 2026-10-03 ok
email.email-mg.matisse.fr 4 2026-04-14 2026-08-12 ok
link.matisse.fr 5 2026-07-12 2026-09-29 ok
mail.matisse.fr 3 2026-08-04 2026-10-03 ok
email.matisse.fr 5 2026-04-29 2026-08-26 ok
n8n.matisse.fr 5 2026-04-30 2026-08-28 ok
composeio.matisse.fr 5 2026-04-30 2026-08-28 ok
demo.matisse.fr 3 2026-08-02 2026-09-30 ok
broker.matisse.fr 5 2026-05-18 2026-09-15 ok
status.matisse.fr 2 2026-04-30 2026-04-30 —
broker-dev.matisse.fr 5 2026-05-18 2026-09-15 ok
www.matisse.fr 5 2026-05-13 2026-09-10 ok

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