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 · 355 ms

HostCertsFirst seenLast seenDNS
caixaforum.org 22 2026-03-12 2026-09-29 ok
macaya.caixaforum.org 11 2026-05-21 2026-09-16 ok
pre.caixaforum.org 10 2026-04-15 2026-09-29 ok
coleccion.caixaforum.org 22 2026-01-15 2026-09-16 ok
pre.coleccion.caixaforum.org 9 2026-01-15 2026-09-09 ok
pretemp.caixaforum.org 1 2025-08-20 2025-08-20 nxdomain
protemp.caixaforum.org 1 2025-08-20 2025-08-20 nxdomain
musicaymatematicas.caixaforum.org 9 2026-02-02 2026-08-13 ok
tickets.caixaforum.org 16 2026-05-23 2026-09-18 ok
ticket.caixaforum.org 23 2025-06-24 2026-10-01 ok
*.ticket.caixaforum.org 58 2025-06-24 2026-10-01 —
www.caixaforum.org 13 2026-04-15 2026-09-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/caixaforum.org (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/caixaforum.org.