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.

3 hosts · 309 ms

HostCertsFirst seenLast seenDNS
goshopback.vn 32 2025-07-30 2026-09-24 ok
*.goshopback.vn 36 2025-07-30 2026-09-24 —
support.goshopback.vn 6 2026-06-03 2026-10-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/goshopback.vn (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/goshopback.vn.