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.

6 hosts · 292 ms

HostCertsFirst seenLast seenDNS
homepros.com 5 2025-09-24 2026-08-25 ok
*.homepros.com 5 2025-09-24 2026-08-25 —
info.homepros.com 5 2026-05-28 2026-09-25 ok
orders.homepros.com 10 2026-05-01 2026-08-28 ok
qrs.homepros.com 4 2026-04-17 2026-09-02 ok
mta-sts.homepros.com 3 2026-05-05 2026-09-24 ok

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