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.

25 hosts · 497 ms

HostCertsFirst seenLast seenDNS
candex.com 40 2025-12-20 2026-09-29 ok
*.candex.com 9 2025-08-24 2026-10-03 —
media.candex.com 9 2026-04-20 2026-10-02 ok
*.qa.candex.com 2 2026-04-17 2026-09-17 —
internal.jira.candex.com 1 2026-01-19 2026-01-19 ok
engage.candex.com 16 2026-05-30 2026-09-25 ok
stg.candex.com 21 2026-03-23 2026-09-27 ok
util-stg.candex.com 17 2026-01-28 2026-09-28 ok
cdn.stg.candex.com 1 2026-06-28 2026-06-28 ok
reach.candex.com 5 2026-04-08 2026-08-10 ok
wordpress.internal.candex.com 4 2026-08-12 2026-08-12 nxdomain
simply-static-preview.internal.candex.com 1 2026-09-24 2026-09-24 nxdomain
util.candex.com 19 2026-01-28 2026-09-29 ok
origin-util.candex.com 1 2026-01-25 2026-01-25 nxdomain
help.candex.com 5 2026-04-22 2026-08-20 ok
s.candex.com 3 2026-05-16 2026-09-02 ok
status.candex.com 5 2026-05-16 2026-09-13 ok
connect.candex.com 32 2026-04-21 2026-09-01 ok
cxsit.candex.com 10 2026-04-30 2026-08-27 ok
chatgpt.candex.com 2 2026-02-22 2026-06-14 ok
trust.candex.com 8 2026-04-09 2026-08-05 ok
dev.candex.com 1 2026-03-23 2026-03-23 nxdomain
cdn-dev.candex.com 1 2026-05-25 2026-05-25 nxdomain
cdn.dev.candex.com 1 2026-05-26 2026-05-26 ok
www.candex.com 42 2026-03-23 2026-09-29 ok

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