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.

10 hosts · 252 ms

HostCertsFirst seenLast seenDNS
inextenso-finance.fr 1 2025-12-17 2025-12-17 ok
mail.inextenso-finance.fr 6 2026-05-09 2026-09-06 ok
eye.mail.inextenso-finance.fr 8 2026-05-09 2026-09-06 ok
img.mail.inextenso-finance.fr 8 2026-05-09 2026-09-06 ok
click.mail.inextenso-finance.fr 9 2026-05-02 2026-10-02 ok
landings.mail.inextenso-finance.fr 8 2026-05-09 2026-09-06 ok
forms.mail.inextenso-finance.fr 8 2026-05-09 2026-09-06 ok
enterpriseregistration.inextenso-finance.fr 2 2025-11-19 2026-06-08 ok
mta-sts.inextenso-finance.fr 5 2026-04-29 2026-08-27 ok
www.inextenso-finance.fr 1 2025-12-17 2025-12-17 ok

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