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 · 281 ms

HostCertsFirst seenLast seenDNS
normreeves.com 14 2026-04-12 2026-08-08 ok
securemail.normreeves.com 2 2025-09-24 2025-09-29 ok
www.securemail.normreeves.com 2 2025-09-24 2025-09-29 nxdomain
status.normreeves.com 8 2026-04-14 2026-08-10 ok
support.normreeves.com 11 2026-06-03 2026-09-29 ok
www.normreeves.com 17 2026-05-03 2026-08-29 ok

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