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.

4 hosts · 274 ms

HostCertsFirst seenLast seenDNS
shredrichmond.com 16 2026-05-10 2026-09-24 ok
*.shredrichmond.com 9 2026-05-10 2026-09-24 —
growth.shredrichmond.com 1 2026-08-19 2026-08-19 ok
www.shredrichmond.com 7 2026-05-14 2026-09-14 ok

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