Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

16 hosts · 196 ms

HostCertsFirst seenLast seen
gatehub.net 53 2026-04-19 2026-10-04
*.gatehub.net 50 2026-04-19 2026-10-04
staging.gatehub.net 4 2026-04-13 2026-08-11
*.staging.gatehub.net 4 2026-04-13 2026-08-11
internal.gatehub.net 4 2026-06-06 2026-10-04
*.internal.gatehub.net 4 2026-06-06 2026-10-04
production.gatehub.net 5 2026-06-05 2026-10-03
*.production.gatehub.net 5 2026-06-05 2026-10-03
scep.gatehub.net 1 2026-09-01 2026-09-01
*.hq.gatehub.net 28 2026-04-21 2026-09-16
docs.gatehub.net 14 2026-05-22 2026-09-18
mta-sts.gatehub.net 9 2026-05-22 2026-09-17
status.gatehub.net 7 2026-04-22 2026-09-14
support.gatehub.net 5 2026-05-26 2026-09-23
sandbox.gatehub.net 20 2026-04-27 2026-10-02
*.sandbox.gatehub.net 20 2026-04-27 2026-10-02

Programmatic access: API GET /v1/hosts/gatehub.net (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/gatehub.net.