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.

23 hosts · 261 ms

HostCertsFirst seenLast seenDNS
casarista.com 8 2025-06-09 2026-08-15 ok
*.casarista.com 6 2026-04-19 2026-08-15 —
xcr2.casarista.com 5 2026-05-28 2026-09-16 ok
knowledge.casarista.com 3 2026-08-01 2026-10-01 ok
bundle.casarista.com 2 2026-05-22 2026-08-20 ok
translate.casarista.com 5 2026-04-28 2026-08-26 ok
staging.casarista.com 9 2026-05-26 2026-09-21 ok
*.staging.casarista.com 9 2026-05-26 2026-09-21 —
xcr-cdn.staging.casarista.com 8 2026-05-10 2026-09-19 ok
xcr.staging.casarista.com 1 2025-12-15 2025-12-15 ok
bc-api.casarista.com 5 2026-05-19 2026-09-16 ok
translate-api.casarista.com 5 2026-04-28 2026-08-26 ok
email.casarista.com 10 2026-04-23 2026-08-20 ok
xcr-cdn.casarista.com 8 2026-05-10 2026-09-19 ok
xcr.casarista.com 2 2025-07-07 2026-07-27 ok
xcalibur.casarista.com 5 2026-05-06 2026-08-24 ok
mis.casarista.com 6 2026-07-19 2026-09-19 ok
tools.casarista.com 5 2026-05-11 2026-09-08 ok
assets.casarista.com 1 2026-02-11 2026-02-11 ok
insights.casarista.com 12 2026-04-22 2026-08-18 ok
xcr.next.casarista.com 5 2026-04-25 2026-08-26 ok
www.casarista.com 2 2025-06-09 2026-06-09 ok
youx.casarista.com 6 2026-04-23 2026-08-20 ok

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