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 · 292 ms

HostCertsFirst seenLast seenDNS
*.valigov.com 4 2025-10-13 2026-09-12 —
*.app.valigov.com 2 2025-10-13 2026-09-12 —
*.us-west-2.app.valigov.com 2 2025-10-13 2026-09-12 —
status.valigov.com 5 2026-05-03 2026-08-29 ok
amplify.valigov.com 2 2026-04-11 2026-09-11 ok

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