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.

10 hosts · 256 ms

HostCertsFirst seenLast seen
lolivier.fr 4 2025-08-11 2026-08-11
*.lolivier.fr 26 2025-08-11 2026-10-08
clic.lolivier.fr 1 2026-01-08 2026-01-08
nvei.lolivier.fr 4 2026-07-01 2026-08-19
mail.lolivier.fr 1 2025-12-09 2025-12-09
www.mail.lolivier.fr 1 2025-12-09 2025-12-09
on.lolivier.fr 5 2026-05-20 2026-10-05
unicorn.lolivier.fr 3 2026-05-10 2026-08-28
fr.lolivier.fr 10 2026-05-11 2026-09-06
sms.lolivier.fr 5 2026-06-03 2026-10-01

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