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.

47 hosts · 230 ms

HostCertsFirst seenLast seen
upguard.com 32 2026-04-19 2026-09-28
*.upguard.com 18 2026-04-19 2026-09-25
kb.upguard.com 13 2026-06-07 2026-10-04
isengard.upguard.com 4 2026-04-22 2026-06-20
*.isengard.upguard.com 4 2026-04-22 2026-06-20
identitydashboard.upguard.com 2 2026-09-03 2026-09-03
*.identitydashboard.upguard.com 2 2026-09-03 2026-09-03
engage.upguard.com 2 2026-07-06 2026-07-06
share.upguard.com 5 2026-04-29 2026-09-01
score.upguard.com 4 2026-06-06 2026-09-23
onboarding.upguard.com 1 2026-09-22 2026-09-22
onboarding.api.upguard.com 2 2026-09-18 2026-09-18
cyber-risk.upguard.com 3 2026-05-09 2026-08-25
ca.cyber-risk.upguard.com 4 2026-04-26 2026-10-07
score-badge.cyber-risk.upguard.com 3 2026-05-10 2026-08-26
auth.cyber-risk.upguard.com 10 2026-05-01 2026-08-28
analytics-api.cyber-risk.upguard.com 3 2026-05-18 2026-09-04
webscan.cyber-risk.upguard.com 4 2026-04-28 2026-10-08
cdn.cyber-risk.upguard.com 5 2026-04-22 2026-10-07
in.cyber-risk.upguard.com 4 2026-04-28 2026-10-08
analytics.cyber-risk.upguard.com 3 2026-06-05 2026-09-22
grc-assets.cyber-risk.upguard.com 2 2026-07-20 2026-09-10
us.cyber-risk.upguard.com 3 2026-05-09 2026-08-25
au.cyber-risk.upguard.com 4 2026-06-07 2026-09-21
eu.cyber-risk.upguard.com 3 2026-05-24 2026-09-11
workflow.cyber-risk.upguard.com 5 2026-06-03 2026-09-18
webscan.upguard.com 3 2026-05-20 2026-09-04
origin.upguard.com 10 2026-05-15 2026-09-10
hello.upguard.com 6 2026-04-17 2026-10-02
help.upguard.com 11 2026-05-31 2026-09-26
app.upguard.com 3 2026-05-09 2026-08-25
dbt-docs.upguard.com 2 2026-04-22 2026-04-22
*.dbt-docs.upguard.com 2 2026-04-22 2026-04-22
changes.upguard.com 2 2026-09-29 2026-09-29
onboardvendors.upguard.com 4 2026-04-16 2026-08-14
ca.onboardvendors.upguard.com 4 2026-04-16 2026-08-14
in.onboardvendors.upguard.com 5 2026-05-10 2026-09-07
au.onboardvendors.upguard.com 4 2026-04-16 2026-08-14
eu.onboardvendors.upguard.com 6 2026-04-16 2026-08-16
assets.upguard.com 5 2026-06-01 2026-09-28
status.upguard.com 5 2026-06-04 2026-09-04
content.upguard.com 8 2026-05-03 2026-08-30
trust.upguard.com 5 2026-05-12 2026-09-09
customer.trust.upguard.com 5 2026-05-12 2026-09-09
www.upguard.com 6 2026-05-31 2026-09-28
selfheal-relay.upguard.com 5 2026-06-18 2026-10-06
security.upguard.com 5 2026-05-20 2026-09-17

Programmatic access: API GET /v1/hosts/upguard.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/upguard.com.