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.

9 hosts · 351 ms

HostCertsFirst seenLast seenDNS
freytagsflorist.com 19 2026-05-01 2026-09-30 ok
*.freytagsflorist.com 9 2026-05-01 2026-09-30 —
posapi.freytagsflorist.com 10 2026-05-18 2026-09-16 nxdomain
trk.freytagsflorist.com 4 2026-10-02 2026-10-02 ok
system.freytagsflorist.com 10 2026-05-18 2026-09-17 ok
cms.freytagsflorist.com 10 2026-05-17 2026-09-16 ok
pos.freytagsflorist.com 10 2026-05-19 2026-09-16 nxdomain
orders.freytagsflorist.com 10 2026-05-19 2026-09-18 ok
www.freytagsflorist.com 10 2026-05-19 2026-09-16 ok

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