Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

6 hosts · 193 ms

HostCertsFirst seenLast seen
thehalara.fr 24 2025-08-13 2026-09-12
*.thehalara.fr 4 2026-04-06 2026-09-12
collective-api.thehalara.fr 10 2025-11-14 2026-05-08
tracking.ib54204.email.thehalara.fr 5 2026-05-31 2026-09-26
www.thehalara.fr 20 2025-08-13 2026-05-08
api-proxy.thehalara.fr 20 2025-08-13 2026-05-08

Programmatic access: API GET /v1/hosts/thehalara.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/thehalara.fr.