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.

5 hosts · 301 ms

HostCertsFirst seenLast seenDNS
belvilla.nl 17 2025-09-11 2026-08-03 ok
cloud.belvilla.nl 4 2025-11-20 2025-12-17 nxdomain
partner.belvilla.nl 8 2026-04-25 2026-08-31 ok
links.belvilla.nl 9 2026-05-24 2026-08-18 ok
www.belvilla.nl 16 2025-09-11 2026-08-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/belvilla.nl (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/belvilla.nl.