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.

12 hosts · 352 ms

HostCertsFirst seenLast seenDNS
walley.fi 1 2026-06-04 2026-06-04 ok
url7346.walley.fi 1 2026-07-06 2026-07-06 ok
b2b.walley.fi 5 2026-05-10 2026-09-06 ok
www.b2b.walley.fi 7 2026-04-28 2026-08-28 ok
blogi.walley.fi 9 2026-06-02 2026-09-28 ok
kontoadmin.walley.fi 34 2026-06-30 2026-09-28 ok
info.walley.fi 10 2026-05-07 2026-09-03 ok
www-test.webapp.walley.fi 5 2026-05-30 2026-09-27 ok
www.webapp.walley.fi 5 2026-05-30 2026-09-27 ok
www.walley.fi 1 2026-06-04 2026-06-04 ok
my.walley.fi 97 2026-02-05 2026-09-30 ok
internal.my.walley.fi 8 2026-06-05 2026-10-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/walley.fi (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/walley.fi.