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.

100 hosts (first page) · 486 ms

HostCertsFirst seenLast seenDNS
clickup.com 16 2025-07-10 2026-09-07 ok
*.clickup.com 26 2025-07-01 2026-09-07 —
*.flatfile-2.clickup.com 2 2025-06-14 2026-05-13 —
api.flatfile-2.clickup.com 2 2025-06-14 2026-05-13 ok
a.clickup.com 5 2026-05-22 2026-08-17 ok
web.clickup.com 1 2026-01-17 2026-01-17 nodata
*.web.clickup.com 1 2026-01-17 2026-01-17 —
agents-hub-read-stage2-eu-central-1.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-staging2-eu-central-1.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-production2-eu-central-1.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-stage2-us-east-1.web.clickup.com 2 2026-03-26 2026-08-26 ok
agents-hub-read-staging2-us-east-1.web.clickup.com 2 2026-03-25 2026-08-25 ok
agents-hub-read-production2-us-east-1.web.clickup.com 2 2026-03-26 2026-08-26 ok
agents-hub-read-stage2-ap-southeast-1.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-staging2-ap-southeast-1.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-production2-ap-southeast-1.web.clickup.com 2 2026-03-24 2026-08-24 ok
blog-stage1.web.clickup.com 2 2026-06-12 2026-06-12 nxdomain
storybook-stage1.web.clickup.com 2 2026-02-22 2026-07-10 ok
*.storybook-stage1.web.clickup.com 2 2026-02-22 2026-07-10 —
endpoint-stage1.web.clickup.com 2 2025-09-29 2026-08-30 ok
agents-hub-read-stage2-us-west-2.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-staging2-us-west-2.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-production2-us-west-2.web.clickup.com 2 2026-03-24 2026-08-24 ok
agents-hub-read-global-stage2.web.clickup.com 8 2026-03-26 2026-08-26 ok
constellation-stage2.web.clickup.com 1 2026-06-02 2026-06-02 ok
templates-stage2.web.clickup.com 1 2026-01-07 2026-01-07 ok
agents-stage2.web.clickup.com 1 2026-02-10 2026-02-10 ok
endpoint-stage2.web.clickup.com 1 2026-01-07 2026-01-07 ok
agents-hub-read-global-staging2.web.clickup.com 8 2026-03-25 2026-08-25 ok
constellation-staging2.web.clickup.com 1 2026-06-01 2026-06-01 ok
templates-staging2.web.clickup.com 1 2026-01-07 2026-01-07 ok
agents-staging2.web.clickup.com 1 2026-02-09 2026-02-09 ok
endpoint-staging2.web.clickup.com 1 2026-01-07 2026-01-07 ok
agents-hub-read-global-production2.web.clickup.com 9 2026-03-26 2026-08-26 ok
constellation-production2.web.clickup.com 1 2026-06-02 2026-06-02 ok
templates-production2.web.clickup.com 1 2026-01-07 2026-01-07 ok
agents-production2.web.clickup.com 1 2026-02-10 2026-02-10 ok
endpoint-production2.web.clickup.com 1 2026-01-07 2026-01-07 ok
blog-yura.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
www.blog-yura.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
data.web.clickup.com 1 2026-02-02 2026-02-02 ok
build-static.web.clickup.com 1 2025-07-24 2025-07-24 nxdomain
*.build-static.web.clickup.com 1 2025-07-24 2025-07-24 —
cu-university-static-prod.web.clickup.com 1 2025-12-10 2025-12-10 ok
*.cu-university-static-prod.web.clickup.com 1 2025-12-10 2025-12-10 —
stage1-landing.web.clickup.com 2 2026-03-26 2026-08-26 ok
build-landing.web.clickup.com 1 2026-01-14 2026-01-14 ok
*.build-landing.web.clickup.com 1 2026-01-14 2026-01-14 —
staging-landing.web.clickup.com 2 2025-06-09 2026-05-10 ok
app-landing.web.clickup.com 2 2025-07-29 2026-06-29 ok
*.app-landing.web.clickup.com 2 2025-07-29 2026-06-29 —
cu-university-static-staging.web.clickup.com 1 2025-12-10 2025-12-10 ok
*.cu-university-static-staging.web.clickup.com 1 2025-12-10 2025-12-10 —
blog-staging.web.clickup.com 4 2026-06-12 2026-06-12 nxdomain
www.blog-staging.web.clickup.com 5 2026-05-20 2026-06-12 nxdomain
storybook-staging.web.clickup.com 2 2026-02-22 2026-07-10 ok
*.storybook-staging.web.clickup.com 2 2026-02-22 2026-07-10 —
templates-staging.web.clickup.com 1 2025-07-16 2025-07-16 nxdomain
blog.web.clickup.com 6 2026-06-10 2026-06-10 nxdomain
www.blog.web.clickup.com 4 2026-06-10 2026-06-10 nxdomain
slapdash.web.clickup.com 1 2026-02-02 2026-02-02 ok
growth.web.clickup.com 1 2026-02-17 2026-02-17 nxdomain
api.web.clickup.com 1 2026-01-19 2026-01-19 ok
storybook.web.clickup.com 2 2026-02-22 2026-07-10 ok
*.storybook.web.clickup.com 2 2026-02-22 2026-07-10 —
blog-adam.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
www.blog-adam.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
sgtm.web.clickup.com 4 2026-05-06 2026-07-05 ok
load.sgtm.web.clickup.com 8 2026-04-27 2026-06-25 ok
cdn.web.clickup.com 2 2025-08-07 2026-07-08 ok
templates-production.web.clickup.com 2 2025-09-29 2026-08-30 ok
endpoint-production.web.clickup.com 2 2025-09-29 2026-08-30 ok
learn.web.clickup.com 18 2026-05-20 2026-09-16 ok
www.learn.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
io.web.clickup.com 1 2026-01-22 2026-01-22 ok
cmp.web.clickup.com 2 2025-06-15 2026-05-16 nxdomain
*.cmp.web.clickup.com 2 2025-06-15 2026-05-16 —
analytics.web.clickup.com 1 2026-01-21 2026-01-21 ok
blog-chris.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
www.blog-chris.web.clickup.com 4 2026-05-20 2026-05-20 nxdomain
links.web.clickup.com 1 2026-02-03 2026-02-03 ok
forms.web.clickup.com 1 2026-02-15 2026-02-15 nxdomain
*.forms.web.clickup.com 1 2026-02-15 2026-02-15 —
partners.web.clickup.com 5 2026-05-05 2026-09-02 ok
chat.web.clickup.com 2 2025-08-14 2026-07-15 nxdomain
*.chat.web.clickup.com 2 2025-08-14 2026-07-15 —
endpoint.web.clickup.com 2 2025-07-27 2026-06-27 ok
build-next.web.clickup.com 2 2026-03-10 2026-07-26 ok
*.build-next.web.clickup.com 2 2026-03-10 2026-07-26 —
api-dev.web.clickup.com 1 2026-01-24 2026-01-24 nxdomain
apidev.web.clickup.com 1 2026-01-24 2026-01-24 nxdomain
cms-preview.web.clickup.com 1 2025-12-03 2025-12-03 ok
*.cms-preview.web.clickup.com 1 2025-12-03 2025-12-03 —
try.web.clickup.com 16 2025-07-16 2026-08-12 ok
verified.clickup.com 5 2026-05-24 2026-09-27 ok
eng-prod.clickup.com 1 2025-06-19 2025-06-19 nodata
*.eng-prod.clickup.com 1 2025-06-19 2025-06-19 —
staging-landing.clickup.com 2 2025-06-09 2026-05-10 ok
staging.clickup.com 2 2026-03-10 2026-07-26 ok
*.staging.clickup.com 4 2026-03-10 2026-07-26 —

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/clickup.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/clickup.com.