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.

75 hosts · 430 ms

HostCertsFirst seenLast seenDNS
*.go365.com 14 2026-02-04 2026-09-08 —
img2.go365.com 1 2026-08-31 2026-08-31 ok
qa2-img2.go365.com 4 2026-04-13 2026-08-23 ok
qa-img2.go365.com 4 2026-04-13 2026-08-23 ok
qa6.go365.com 3 2026-06-17 2026-08-22 ok
nuanceiva.go365.com 4 2026-04-08 2026-08-31 ok
qa-nuanceiva.go365.com 6 2026-03-31 2026-08-23 ok
qa-mf-preference.go365.com 3 2026-06-17 2026-08-22 ok
data.engage.go365.com 4 2025-08-04 2026-08-06 ok
manage.engage.go365.com 6 2025-08-21 2026-08-23 ok
cdn.engage.go365.com 12 2025-07-31 2026-09-21 ok
userprofile.go365.com 3 2026-04-30 2026-09-01 nxdomain
qa-userprofile.go365.com 8 2026-04-30 2026-10-01 ok
stage-userprofile.go365.com 3 2026-04-30 2026-09-22 nxdomain
uat-userprofile.go365.com 8 2026-04-30 2026-09-30 ok
dev-userprofile.go365.com 7 2026-04-30 2026-09-28 ok
community.medicare.go365.com 7 2026-06-09 2026-08-20 ok
dev-authenticate.go365.com 6 2025-09-18 2026-08-11 nxdomain
balancedhealth.go365.com 1 2026-08-31 2026-08-31 ok
qa-balancedhealth.go365.com 6 2026-04-13 2026-08-23 ok
auth.go365.com 6 2025-08-06 2026-09-01 ok
qa2-auth.go365.com 8 2026-01-14 2026-08-23 ok
qa-auth.go365.com 7 2025-10-10 2026-08-24 ok
int-auth.go365.com 4 2026-04-13 2026-08-23 ok
dev-auth.go365.com 13 2025-09-18 2026-08-23 ok
qa-ciam.go365.com 4 2026-04-13 2026-08-23 ok
program.go365.com 3 2026-03-05 2026-08-31 ok
qa-program.go365.com 7 2026-04-13 2026-10-01 ok
es-qa-program.go365.com 4 2026-04-13 2026-08-23 ok
qa-admin.go365.com 1 2026-05-19 2026-05-19 nxdomain
stage-admin.go365.com 4 2026-06-01 2026-06-01 nxdomain
test-admin.go365.com 1 2026-04-26 2026-04-26 nxdomain
autodiscover.go365.com 3 2026-06-05 2026-08-21 ok
smetrics.go365.com 5 2026-04-09 2026-08-31 ok
api-services.go365.com 1 2026-08-31 2026-08-31 ok
qa-api-services.go365.com 4 2026-04-13 2026-08-23 ok
cloud.communications.go365.com 2 2026-05-14 2026-05-14 ok
image.communications.go365.com 2 2025-12-11 2026-05-18 ok
click.communications.go365.com 2 2026-05-14 2026-05-14 ok
view.communications.go365.com 1 2026-05-23 2026-05-23 ok
wellness.go365.com 7 2026-03-23 2026-08-31 ok
qa-wellness.go365.com 6 2025-07-01 2026-08-23 ok
es-qa-wellness.go365.com 6 2026-04-13 2026-08-23 ok
stage-wellness.go365.com 3 2025-06-30 2026-08-31 ok
es-wellness.go365.com 1 2026-08-31 2026-08-31 ok
dev-wellness.go365.com 6 2025-09-10 2026-08-23 ok
es-dev-wellness.go365.com 3 2026-06-07 2026-08-12 ok
preview-wellness.go365.com 8 2025-06-30 2026-08-23 ok
target.go365.com 1 2026-08-31 2026-08-31 ok
uat-acount.go365.com 1 2026-08-03 2026-08-03 nxdomain
account.go365.com 4 2025-07-16 2026-09-03 ok
qa2-account.go365.com 6 2026-02-11 2026-08-23 ok
qa3-account.go365.com 5 2026-04-18 2026-08-28 ok
qa-account.go365.com 6 2026-04-13 2026-08-23 ok
es-qa-account.go365.com 4 2026-04-13 2026-08-23 ok
stage-account.go365.com 3 2026-08-03 2026-08-31 ok
perf-account.go365.com 1 2026-10-05 2026-10-05 nxdomain
es-account.go365.com 1 2026-08-31 2026-08-31 ok
uat-account.go365.com 1 2026-08-03 2026-08-03 nxdomain
dev-account.go365.com 2 2026-05-12 2026-08-03 nxdomain
es-dev-account.go365.com 3 2026-06-07 2026-08-12 ok
www.go365.com 5 2025-06-13 2026-09-01 ok
qa2-www.go365.com 1 2026-04-13 2026-04-13 nxdomain
qa3-www.go365.com 1 2026-04-13 2026-04-13 nxdomain
qa4-www.go365.com 1 2026-04-13 2026-04-13 nxdomain
qa6-www.go365.com 7 2026-04-13 2026-08-23 ok
qa-www.go365.com 6 2026-04-14 2026-09-01 ok
es-qa-www.go365.com 4 2026-04-13 2026-08-23 ok
stage-www.go365.com 1 2026-08-31 2026-08-31 ok
es-www.go365.com 1 2026-08-31 2026-08-31 ok
dev-www.go365.com 10 2025-09-19 2026-08-25 ok
es-dev-www.go365.com 3 2026-06-07 2026-08-12 ok
data.notify.go365.com 4 2025-08-04 2026-08-06 ok
cdn.notify.go365.com 11 2025-07-31 2026-09-21 ok
qap-community.go365.com 3 2025-06-23 2026-07-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/go365.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/go365.com.