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.

12 hosts · 294 ms

HostCertsFirst seenLast seenDNS
nbx.com 48 2026-04-13 2026-10-03 ok
*.nbx.com 35 2026-04-13 2026-10-03 —
*.frontend.nbx.com 6 2026-05-20 2026-09-15 —
auth.nbx.com 4 2026-04-23 2026-08-19 ok
api.nbx.com 8 2026-04-28 2026-08-24 ok
*.api.nbx.com 8 2026-04-28 2026-08-24 —
go.nbx.com 2 2026-09-24 2026-09-24 ok
*.go.nbx.com 2 2026-09-24 2026-09-24 —
signicat.nbx.com 5 2026-05-27 2026-09-25 ok
dev.nbx.com 8 2026-04-28 2026-08-24 ok
*.dev.nbx.com 8 2026-04-28 2026-08-24 —
www.nbx.com 10 2026-05-03 2026-08-30 ok

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