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) · 405 ms

HostCertsFirst seenLast seenDNS
notion.com 43 2025-07-27 2026-09-29 ok
*.notion.com 34 2026-03-12 2026-10-03 —
prod.notion.com 7 2026-09-11 2026-09-23 nodata
us-west-2.gotenberg.infra-prod.notion.com 1 2026-06-12 2026-06-12 ok
global.gotenberg.infra-prod.notion.com 1 2026-06-12 2026-06-12 ok
eu-central-1.poi.infra-prod.notion.com 3 2026-05-01 2026-10-01 ok
us-west-2.poi.infra-prod.notion.com 3 2026-05-01 2026-10-01 ok
global.poi.infra-prod.notion.com 6 2026-05-01 2026-10-01 ok
eu-central-1.clients.poi.infra-prod.notion.com 1 2026-07-08 2026-07-08 ok
us-west-2.clients.poi.infra-prod.notion.com 1 2026-07-08 2026-07-08 ok
global.clients.poi.infra-prod.notion.com 2 2026-07-08 2026-07-08 ok
eu-central-1.imgproxy.infra-prod.notion.com 2 2026-04-17 2026-09-17 ok
ap-northeast-1.imgproxy.infra-prod.notion.com 3 2026-04-29 2026-09-29 ok
ap-northeast-2.imgproxy.infra-prod.notion.com 3 2026-04-29 2026-09-29 ok
us-west-2.imgproxy.infra-prod.notion.com 3 2026-04-17 2026-09-17 ok
global.imgproxy.infra-prod.notion.com 11 2026-04-17 2026-09-29 ok
*.prod.notion.com 21 2026-04-26 2026-09-23 —
*.app.prod.notion.com 4 2026-08-27 2026-09-11 —
cloud.notion.com 3 2026-02-18 2026-03-19 ok
*.services.cloud.notion.com 1 2026-03-19 2026-03-19 —
file.notion.com 2 2026-04-14 2026-09-14 ok
stg.notion.com 15 2026-01-16 2026-10-02 ok
us-west-2.gotenberg.infra-stg.notion.com 1 2026-06-12 2026-06-12 ok
global.gotenberg.infra-stg.notion.com 1 2026-06-12 2026-06-12 ok
us-west-2.poi.infra-stg.notion.com 3 2026-05-01 2026-10-01 ok
global.poi.infra-stg.notion.com 3 2026-05-01 2026-10-01 ok
us-west-2.clients.poi.infra-stg.notion.com 1 2026-07-08 2026-07-08 ok
global.clients.poi.infra-stg.notion.com 1 2026-07-08 2026-07-08 ok
us-west-2.imgproxy.infra-stg.notion.com 2 2026-04-17 2026-09-17 ok
global.imgproxy.infra-stg.notion.com 2 2026-04-17 2026-09-17 ok
api-stg.notion.com 2 2026-05-02 2026-10-02 ok
integrations-api-stg.notion.com 2 2026-05-02 2026-10-02 ok
*.stg.notion.com 23 2026-01-16 2026-09-25 —
file.stg.notion.com 2 2026-04-08 2026-09-08 ok
*.admin.stg.notion.com 2 2026-08-28 2026-08-28 —
msgstore.admin.stg.notion.com 2 2026-08-27 2026-08-27 nxdomain
*.app.stg.notion.com 12 2026-03-24 2026-09-03 —
files.stg.notion.com 1 2026-04-08 2026-04-08 nxdomain
next.stg.notion.com 1 2026-07-30 2026-07-30 ok
api.notion.com 8 2025-07-27 2026-09-29 ok
calendar-api.notion.com 1 2026-07-09 2026-07-09 ok
integrations-api.notion.com 8 2025-07-27 2026-09-29 ok
mail.notion.com 50 2026-03-30 2026-10-02 ok
*.mail.notion.com 20 2026-03-30 2026-10-02 —
mg.mail.notion.com 5 2026-06-04 2026-10-02 ok
cspreports.mail.notion.com 14 2026-05-28 2026-09-23 ok
mail-resource-proxy.mail.notion.com 14 2026-06-04 2026-10-01 ok
links.team.notion.com 1 2026-08-18 2026-08-18 ok
em.notion.com 10 2026-04-19 2026-08-16 ok
info.notion.com 10 2026-04-28 2026-08-24 ok
mcp.notion.com 7 2026-05-08 2026-09-04 ok
app.notion.com 11 2026-06-10 2026-10-06 ok
*.app.notion.com 25 2026-03-24 2026-10-06 —
calendar.notion.com 1 2026-07-09 2026-07-09 ok
trustcenter.notion.com 4 2026-04-16 2026-08-13 ok
labs.notion.com 2 2026-08-04 2026-10-05 ok
faces.notion.com 5 2026-04-24 2026-08-25 ok
stg.linux-packages.notion.com 2 2026-08-28 2026-08-28 ok
app.linux-packages.notion.com 2 2026-08-28 2026-08-28 ok
dev.linux-packages.notion.com 2 2026-08-28 2026-08-28 ok
mg.updates.notion.com 5 2026-06-05 2026-10-03 ok
developers.notion.com 5 2026-05-26 2026-09-27 ok
events.notion.com 5 2026-05-12 2026-09-09 ok
trust.notion.com 5 2026-06-23 2026-08-22 ok
next.notion.com 1 2026-07-31 2026-07-31 ok
dev.notion.com 23 2025-06-30 2026-10-01 ok
us-west-2.gotenberg.infra-dev.notion.com 1 2026-06-12 2026-06-12 ok
global.gotenberg.infra-dev.notion.com 1 2026-06-12 2026-06-12 ok
ap-northeast-1.poi.infra-dev.notion.com 1 2026-05-01 2026-05-01 ok
ap-northeast-2.poi.infra-dev.notion.com 1 2026-05-01 2026-05-01 ok
us-west-2.poi.infra-dev.notion.com 3 2026-05-01 2026-10-01 ok
global.poi.infra-dev.notion.com 5 2026-05-01 2026-10-01 ok
ap-northeast-1.clients.poi.infra-dev.notion.com 1 2026-07-08 2026-07-08 ok
ap-northeast-2.clients.poi.infra-dev.notion.com 1 2026-07-08 2026-07-08 ok
us-west-2.clients.poi.infra-dev.notion.com 1 2026-07-08 2026-07-08 ok
global.clients.poi.infra-dev.notion.com 3 2026-07-08 2026-07-08 ok
eu-central-1.imgproxy.infra-dev.notion.com 3 2026-04-17 2026-09-17 ok
ap-northeast-1.imgproxy.infra-dev.notion.com 1 2026-04-23 2026-04-23 ok
ap-northeast-2.imgproxy.infra-dev.notion.com 1 2026-04-17 2026-04-17 ok
us-west-2.imgproxy.infra-dev.notion.com 2 2026-04-17 2026-09-17 ok
global.imgproxy.infra-dev.notion.com 7 2026-04-17 2026-09-17 ok
cloud-dev.notion.com 4 2026-02-18 2026-08-19 ok
*.services.cloud-dev.notion.com 2 2026-03-19 2026-08-19 —
api-dev.notion.com 8 2025-06-30 2026-08-19 ok
integrations-api-dev.notion.com 8 2025-06-30 2026-08-19 ok
*.dev.notion.com 31 2026-02-24 2026-10-01 —
file.dev.notion.com 2 2026-04-10 2026-09-10 ok
calendar-api.dev.notion.com 1 2026-06-29 2026-06-29 ok
storybook.dev.notion.com 1 2026-05-14 2026-05-14 ok
mail.dev.notion.com 43 2026-03-11 2026-09-13 ok
*.mail.dev.notion.com 24 2026-03-11 2026-09-13 —
cspreports.mail.dev.notion.com 20 2026-05-09 2026-09-05 ok
mail-resource-proxy.mail.dev.notion.com 16 2026-06-04 2026-10-01 ok
*.admin.dev.notion.com 8 2026-08-28 2026-08-28 —
msgstore.admin.dev.notion.com 2 2026-08-27 2026-08-27 nxdomain
*.app.dev.notion.com 21 2026-03-24 2026-09-04 —
calendar.dev.notion.com 1 2026-06-29 2026-06-29 ok
labs.dev.notion.com 2 2026-08-03 2026-10-05 ok
faces.dev.notion.com 5 2026-04-27 2026-08-28 ok
next.dev.notion.com 2 2026-04-30 2026-05-14 ok

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/notion.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/notion.com.