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.

40 hosts · 319 ms

HostCertsFirst seenLast seenDNS
gu-global.com 7 2025-07-11 2026-09-17 ok
*.gu-global.com 18 2025-07-01 2026-09-17 —
*.gu-first-allocation.ap-northeast-1.gu-global.com 1 2026-01-02 2026-01-02 —
*.radica.gu-global.com 1 2025-12-05 2025-12-05 —
*.gu-first-allocation.ap-northeast-1.staging.gu-global.com 1 2025-11-27 2025-11-27 —
*.org.staging.gu-global.com 2 2025-10-11 2026-09-10 —
digital-signage-org.gu-global.com 4 2026-05-31 2026-09-19 ok
staging-digital-signage-org.gu-global.com 5 2026-04-24 2026-10-03 ok
api-digital-signage-org.gu-global.com 5 2026-04-17 2026-09-24 ok
staging-api-digital-signage-org.gu-global.com 3 2026-05-05 2026-08-24 ok
*.org.gu-global.com 1 2025-08-07 2025-08-07 —
fr-auth.ap-northeast-1.fr-auth.gu-global.com 1 2026-01-13 2026-01-13 ok
mgmttpu.ap-northeast-1.official.gu-global.com 1 2025-10-07 2025-10-07 nxdomain
m4.mm.gu-global.com 1 2026-01-27 2026-01-27 nxdomain
res4.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
t4.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
m5.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
res5.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
t5.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
m6.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
res6.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
t6.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
web.mm.gu-global.com 1 2026-01-27 2026-01-27 ok
m.mm.gu-global.com 2 2025-09-03 2026-01-27 ok
res.mm.gu-global.com 2 2025-09-02 2026-01-27 ok
t.mm.gu-global.com 2 2025-09-03 2026-01-27 ok
queue-jp.gu-global.com 4 2025-12-18 2026-09-07 ok
prodtest-queue-jp.gu-global.com 5 2025-06-25 2026-09-07 ok
cxrfns.gu-global.com 2 2026-05-22 2026-07-23 ok
mta-sts.gu-global.com 1 2026-01-22 2026-01-22 nxdomain
queue-us.gu-global.com 5 2025-12-18 2026-09-07 ok
m1.us.gu-global.com 3 2025-06-13 2026-06-01 ok
res1.us.gu-global.com 3 2025-06-13 2026-06-01 ok
t1.us.gu-global.com 3 2025-06-13 2026-06-01 ok
m4.us.gu-global.com 2 2025-07-01 2026-06-01 ok
res4.us.gu-global.com 2 2025-07-01 2026-06-01 ok
t4.us.gu-global.com 2 2025-07-01 2026-06-01 ok
web.us.gu-global.com 2 2025-07-01 2026-06-01 ok
prodtest.gu-global.com 4 2026-02-15 2026-08-19 ok
www.gu-global.com 3 2025-06-19 2026-05-20 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gu-global.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/gu-global.com.