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.

9 hosts · 324 ms

HostCertsFirst seenLast seenDNS
coter-numerique.org 6 2025-06-30 2026-06-30 ok
*.coter-numerique.org 2 2025-06-30 2026-06-30 —
bluemind.coter-numerique.org 8 2026-05-26 2026-09-23 ok
congres-preprod.coter-numerique.org 5 2026-05-14 2026-10-05 ok
mobile.coter-numerique.org 3 2026-05-13 2026-08-28 ok
img.information.coter-numerique.org 12 2026-05-12 2026-09-07 ok
r.information.coter-numerique.org 4 2026-05-05 2026-07-24 ok
congres.coter-numerique.org 5 2026-05-14 2026-10-05 ok
www.coter-numerique.org 4 2026-05-26 2026-06-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/coter-numerique.org (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/coter-numerique.org.