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.

100 hosts (first page) · 330 ms

HostCertsFirst seenLast seen
fool.com 7 2025-12-08 2026-09-21
*.fool.com 9 2025-07-29 2026-10-01
bigip03.fool.com 1 2026-05-29 2026-05-29
www.bigip03.fool.com 1 2026-05-29 2026-05-29
bigip04.fool.com 1 2026-05-29 2026-05-29
www.bigip04.fool.com 1 2026-05-29 2026-05-29
staging.alpha.fool.com 4 2026-01-29 2026-02-10
staging.athena.fool.com 5 2025-10-16 2026-02-10
staging.hydra.fool.com 5 2025-10-16 2026-02-10
preview-staging.hydra.fool.com 5 2025-10-16 2026-02-10
preview.hydra.fool.com 8 2025-10-16 2026-08-04
staging.foolomatic.fool.com 4 2026-01-29 2026-02-10
investorisland.fool.com 2 2026-04-07 2026-09-07
staging.billboard.fool.com 5 2025-10-16 2026-02-10
ffe.fool.com 2 2025-09-08 2026-08-09
staging2.ffe.fool.com 4 2026-01-29 2026-02-10
staging.ffe.fool.com 5 2025-10-16 2026-02-10
preview.ffe.fool.com 3 2026-03-04 2026-08-04
foolhome.fool.com 2 2026-03-02 2026-08-02
api.foolhome.fool.com 4 2026-03-02 2026-08-30
g.fool.com 12 2026-05-13 2026-09-08
api-staging.fool.com 10 2026-05-14 2026-09-09
ecap-api-staging.fool.com 4 2026-01-29 2026-02-10
devportal-staging.fool.com 4 2026-01-29 2026-02-10
discussion-staging.fool.com 7 2026-06-07 2026-10-06
ffe-docker-staging.fool.com 4 2026-01-29 2026-02-10
jenkins-docker-staging.fool.com 4 2026-01-29 2026-02-10
kong-ui-eks-staging.fool.com 4 2026-01-29 2026-02-10
*.eks-staging.fool.com 4 2025-07-20 2026-06-28
community-staging.fool.com 5 2026-05-14 2026-09-12
*.staging.fool.com 2 2025-07-28 2026-06-28
pando.staging.fool.com 10 2026-04-27 2026-08-24
mcp.staging.fool.com 4 2026-09-15 2026-09-15
auth.fool.com 10 2026-04-30 2026-08-27
staging.auth.fool.com 10 2026-05-01 2026-08-28
development.auth.fool.com 10 2026-04-29 2026-08-26
sandbox.auth.fool.com 10 2026-04-30 2026-08-28
api.fool.com 10 2026-05-14 2026-09-09
staging.commerce-ui.fool.com 5 2025-10-16 2026-02-10
staging.admin-ui.fool.com 5 2025-10-16 2026-02-10
consenter-center-uk.fool.com 1 2025-08-25 2025-08-25
staging.consenter-center-uk.fool.com 1 2025-08-25 2025-08-25
op-scim.fool.com 1 2025-07-07 2025-07-07
n8n.fool.com 1 2025-06-26 2025-06-26
staging.marketing-campaign.fool.com 5 2025-10-16 2026-02-10
staging.admin.fool.com 5 2025-10-16 2026-02-10
discussion.fool.com 4 2026-06-07 2026-10-05
*.eks-production.fool.com 2 2025-07-21 2026-06-21
*.production.fool.com 2 2025-11-06 2026-10-07
marthetron.fool.com 2 2026-04-09 2026-09-09
staging.marthetron.fool.com 5 2025-10-16 2026-02-10
staging.infotron.fool.com 5 2025-10-16 2026-02-10
happeo.fool.com 4 2026-04-28 2026-10-07
staging.fool-iq.fool.com 4 2026-01-29 2026-02-10
staging.iq.fool.com 5 2025-10-16 2026-02-10
staging.consenter-center.fool.com 5 2025-10-16 2026-02-10
staging.investigator.fool.com 4 2026-01-29 2026-02-10
staging.surveyor.fool.com 5 2025-10-16 2026-02-10
marketing-jobs.fool.com 2 2026-04-08 2026-09-08
staging.marketing-jobs.fool.com 5 2025-10-16 2026-02-10
staging.dubs.fool.com 5 2025-10-16 2026-02-10
preview.dubs.fool.com 3 2026-03-04 2026-08-04
boards.fool.com 4 2025-09-08 2026-09-12
staging.discourse-boards.fool.com 4 2026-01-29 2026-02-10
staging.boards.fool.com 5 2025-10-16 2026-02-10
*.eks-shared-services.fool.com 2 2025-11-03 2026-10-04
staging.affiliates.fool.com 4 2026-01-29 2026-02-10
staging.django-microsites.fool.com 5 2025-10-16 2026-02-10
preview.django-microsites.fool.com 3 2026-03-04 2026-08-04
epicrankings.fool.com 7 2026-05-29 2026-09-19
clicks.fool.com 6 2026-05-13 2026-09-08
rancher-eks.fool.com 2 2025-11-05 2026-10-06
runbooks.fool.com 5 2026-04-26 2026-08-25
marketing-tools.fool.com 2 2026-04-07 2026-09-07
staging.marketing-tools.fool.com 5 2025-10-16 2026-02-10
staging.sanity-cms.fool.com 5 2025-10-16 2026-02-10
staging.cms.fool.com 5 2025-10-16 2026-02-10
staging.mms.fool.com 5 2025-10-16 2026-02-10
preview.mms.fool.com 8 2025-10-16 2026-08-04
investorsolutions.fool.com 10 2026-04-16 2026-08-13
caps.fool.com 1 2025-11-24 2025-11-24
*.caps.fool.com 1 2025-11-24 2025-11-24
staging.caps.fool.com 5 2025-10-16 2026-02-10
careers.fool.com 10 2026-04-19 2026-08-16
devicewatchers.fool.com 3 2026-07-23 2026-09-22
newsletters.fool.com 2 2025-09-08 2026-08-09
staging.newsletters.fool.com 5 2025-10-16 2026-02-10
staging.fool-iq-insights.fool.com 5 2025-10-16 2026-02-10
preview.snapshots.fool.com 3 2026-03-04 2026-08-04
staging.chat.fool.com 5 2025-10-16 2026-02-10
api.pink-boat.fool.com 3 2025-09-18 2026-08-26
www.api.pink-boat.fool.com 1 2025-09-18 2025-09-18
evs.pink-boat.fool.com 2 2026-03-25 2026-08-25
staging.feeds-project.fool.com 5 2025-10-16 2026-02-10
accountmanagement.fool.com 8 2026-04-16 2026-08-12
*.eks-development.fool.com 2 2025-07-23 2026-06-23
*.development.fool.com 2 2026-03-07 2026-07-23
staging.content.fool.com 4 2026-01-29 2026-02-10
support.fool.com 5 2026-05-22 2026-09-19
test.fool.com 6 2026-05-07 2026-09-10

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/fool.com.

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/fool.com.