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.

35 hosts · 349 ms

HostCertsFirst seenLast seenDNS
123loadboard.com 8 2025-07-28 2026-09-24 ok
*.123loadboard.com 7 2025-07-28 2026-09-24 —
qa.123loadboard.com 5 2026-05-20 2026-09-17 nodata
*.qa.123loadboard.com 8 2025-10-13 2026-09-17 —
app.members.qa.123loadboard.com 5 2026-05-09 2026-09-06 ok
*.app.members.qa.123loadboard.com 5 2026-05-09 2026-09-06 —
beta.123loadboard.com 5 2026-05-27 2026-09-24 ok
*.beta.123loadboard.com 5 2026-05-27 2026-09-24 —
app.members.beta.123loadboard.com 4 2026-04-10 2026-08-08 ok
*.app.members.beta.123loadboard.com 4 2026-04-10 2026-08-08 —
ci.123loadboard.com 5 2026-05-22 2026-09-19 nodata
*.ci.123loadboard.com 5 2026-05-22 2026-09-19 —
app.members.ci.123loadboard.com 5 2026-05-09 2026-09-06 ok
*.app.members.ci.123loadboard.com 5 2026-05-09 2026-09-06 —
codejam.123loadboard.com 5 2026-04-29 2026-08-29 ok
go.123loadboard.com 10 2026-04-28 2026-09-25 ok
help.123loadboard.com 6 2026-06-02 2026-09-30 ok
ftp.123loadboard.com 1 2026-04-20 2026-04-20 ok
www.ftp.123loadboard.com 1 2026-04-20 2026-04-20 nxdomain
jobs.123loadboard.com 5 2026-04-26 2026-08-26 ok
app.members.123loadboard.com 5 2026-04-30 2026-08-28 ok
*.app.members.123loadboard.com 5 2026-04-30 2026-08-28 —
get.123loadboard.com 5 2026-04-26 2026-08-26 ok
it.123loadboard.com 5 2026-06-02 2026-09-30 nodata
*.it.123loadboard.com 5 2026-06-02 2026-09-30 —
qa.it.123loadboard.com 2 2026-03-24 2026-08-24 ok
fe.it.123loadboard.com 1 2025-07-10 2025-07-10 nxdomain
gl.it.123loadboard.com 1 2025-07-10 2025-07-10 nxdomain
gitmirror.it.123loadboard.com 2 2026-03-24 2026-08-24 ok
hass.it.123loadboard.com 3 2026-03-24 2026-08-24 ok
dev.123loadboard.com 5 2026-05-19 2026-09-16 ok
*.dev.123loadboard.com 7 2026-03-31 2026-09-16 —
app.members.dev.123loadboard.com 5 2026-05-09 2026-09-06 ok
*.app.members.dev.123loadboard.com 5 2026-05-09 2026-09-06 —
www.123loadboard.com 3 2025-07-28 2026-06-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/123loadboard.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/123loadboard.com.