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.

5 hosts · 208 ms

HostCertsFirst seenLast seen
artzt.eu 15 2026-04-16 2026-09-27
odoov8.artzt.eu 5 2026-04-23 2026-08-21
odoo.artzt.eu 5 2026-05-02 2026-08-30
account.artzt.eu 7 2026-04-22 2026-08-31
www.artzt.eu 12 2026-04-13 2026-10-01

Programmatic access: API GET /v1/hosts/artzt.eu (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/artzt.eu.