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.

5 hosts · 335 ms

HostCertsFirst seenLast seenDNS
swirlwineshop.com 26 2026-04-15 2026-10-03 ok
*.swirlwineshop.com 11 2026-04-28 2026-10-03 —
tracking.swirlwineshop.com 14 2026-05-17 2026-09-12 ok
account.swirlwineshop.com 7 2026-04-14 2026-08-24 ok
www.swirlwineshop.com 15 2026-04-13 2026-09-26 ok

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