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.

15 hosts · 274 ms

HostCertsFirst seenLast seenDNS
compte-nickel.fr 1 2025-11-05 2025-11-05 ok
*.compte-nickel.fr 1 2025-11-05 2025-11-05 —
preprod.compte-nickel.fr 1 2026-05-12 2026-05-12 nodata
*.preprod.compte-nickel.fr 1 2026-05-12 2026-05-12 —
monespace.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
aide.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
portail-borne.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
mailbot-api.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
formation.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
souscription.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
mon.compte-nickel.fr 27 2025-08-14 2026-07-22 ok
devenir-distributeur.compte-nickel.fr 2 2025-08-14 2025-08-14 nxdomain
resources.compte-nickel.fr 7 2026-07-13 2026-07-16 ok
widgets.compte-nickel.fr 20 2025-08-14 2026-08-25 nxdomain
www.compte-nickel.fr 7 2026-07-13 2026-07-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/compte-nickel.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/compte-nickel.fr.