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 · 300 ms

HostCertsFirst seenLast seenDNS
beachriot.com 18 2026-05-08 2026-09-19 ok
*.beachriot.com 7 2026-05-08 2026-09-03 —
kvqej.beachriot.com 8 2026-04-14 2026-08-11 ok
mail.beachriot.com 16 2026-05-10 2026-09-18 ok
shop.beachriot.com 5 2026-05-23 2026-09-20 ok
account.beachriot.com 17 2026-04-29 2026-09-08 ok
www.beachriot.com 5 2026-05-25 2026-09-21 ok
try.beachriot.com 3 2026-06-06 2026-08-06 ok

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