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 · 301 ms

HostCertsFirst seenLast seenDNS
andersonslawn.com 19 2025-10-06 2026-09-30 ok
*.andersonslawn.com 5 2026-06-02 2026-09-30 —
20250709-kentest-1-a.andersonslawn.com 4 2026-06-04 2026-10-02 nxdomain
email.subscription.andersonslawn.com 5 2026-05-02 2026-08-29 ok
www.andersonslawn.com 18 2025-10-06 2026-08-25 ok

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