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.

4 hosts · 281 ms

HostCertsFirst seenLast seenDNS
dechristelijke.nl 3 2025-08-22 2026-08-19 ok
communicatieshop.dechristelijke.nl 2 2025-08-26 2026-08-19 ok
www.communicatieshop.dechristelijke.nl 2 2025-08-26 2026-08-19 nxdomain
www.dechristelijke.nl 3 2025-08-22 2026-08-19 ok

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