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.

16 hosts · 250 ms

HostCertsFirst seenLast seenDNS
condenast.com.tw 15 2025-10-06 2026-07-09 ok
*.condenast.com.tw 16 2025-10-06 2026-07-09 —
*.beta.condenast.com.tw 10 2026-05-09 2026-09-19 —
cdp-pr-5.beta.condenast.com.tw 1 2026-04-20 2026-04-20 nxdomain
cdp-pr-6.beta.condenast.com.tw 2 2026-07-22 2026-07-22 nxdomain
cdp-pr-7.beta.condenast.com.tw 2 2026-07-21 2026-07-21 nxdomain
cdp-pr-8.beta.condenast.com.tw 2 2026-07-31 2026-07-31 nxdomain
cdp-prod.beta.condenast.com.tw 5 2026-05-26 2026-09-23 ok
callback-staging.beta.condenast.com.tw 5 2026-05-31 2026-09-28 ok
cdp-staging.beta.condenast.com.tw 5 2026-05-25 2026-09-22 ok
cdp-preview.beta.condenast.com.tw 5 2026-05-26 2026-09-23 ok
callback.condenast.com.tw 5 2026-06-02 2026-09-30 ok
link.condenast.com.tw 5 2026-05-24 2026-09-21 ok
cdp.condenast.com.tw 6 2026-06-02 2026-09-30 ok
hrworkflow.condenast.com.tw 1 2026-03-02 2026-03-02 ok
link.cnx.condenast.com.tw 5 2026-05-24 2026-09-21 ok

Programmatic access, with DNS A records: API GET /v1/hosts/condenast.com.tw (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/condenast.com.tw.