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 · 302 ms

HostCertsFirst seenLast seenDNS
img.contacto.bdf.com.ni 1 2026-04-22 2026-04-22 ok
trck.contacto.bdf.com.ni 1 2026-04-28 2026-04-28 ok
go.contacto.bdf.com.ni 1 2026-04-28 2026-04-28 ok
app.contacto.bdf.com.ni 2 2026-04-22 2026-04-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/contacto.bdf.com.ni (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/contacto.bdf.com.ni.