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.

8 hosts · 263 ms

HostCertsFirst seenLast seenDNS
cadenlane.com 16 2026-05-15 2026-09-22 ok
i.cadenlane.com 3 2026-05-05 2026-08-18 ok
ssapi.cadenlane.com 3 2026-05-30 2026-09-16 ok
ssjfm.cadenlane.com 18 2026-05-02 2026-08-28 ok
shop.cadenlane.com 14 2026-05-26 2026-09-21 ok
sms.cadenlane.com 10 2026-05-09 2026-09-04 ok
account.cadenlane.com 13 2026-04-18 2026-10-01 ok
www.cadenlane.com 5 2026-05-15 2026-08-31 ok

Programmatic access, with DNS A records: API GET /v1/hosts/cadenlane.com (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/cadenlane.com.