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.

7 hosts · 246 ms

HostCertsFirst seenLast seenDNS
crimston.pl 14 2026-04-11 2026-09-24 ok
*.crimston.pl 9 2026-04-11 2026-09-22 —
b2b.crimston.pl 1 2026-02-27 2026-02-27 ok
www.b2b.crimston.pl 1 2026-02-27 2026-02-27 ok
sklep.crimston.pl 5 2026-05-27 2026-09-24 ok
www.sklep.crimston.pl 5 2026-05-27 2026-09-24 ok
www.crimston.pl 5 2026-05-27 2026-09-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/crimston.pl (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/crimston.pl.