Location
United States
Country level only
Domain
notion.so
Hosted by Notion Labs in the United States. Only the country is known, which is common for anycast and CDN addresses.
Still looking this up. This tab fills in as the answers arrive.
Network Every network on the internet has an autonomous system number (ASN). This is the one that announces this address.
AS33191Notion Labs
Notion Labs, Inc.
BGP prefixPrefix The block of addresses this IP is announced in to the rest of the internet. RPKI valid means the block's owner signed off on the network announcing it.
RPKI valid208.103.161.0/24
Seen by 3,051 peers
Latency Round trip for an HTTPS request from your browser to the site and back, including the server's reply time.
Live— ms
Measuring from your browser…
At a glance
Route
Finding a probe near you…
Networks crossed
Each network is an autonomous system (AS). Your traffic is handed from one to the next where they connect, following
the routes BGP advertises.
- AS16509Anthropic, PBC
- AS33191Notion Labs
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
Protected from spoofing
Mail that fails its checks is sent to spam under notion.so's DMARC policy, so forged mail doesn't reach inboxes.
- Receives mail
- No mail servers
- SPFLists the servers allowed to send mail for the domain. Receivers check it against the sending server.
- Soft-fails everything else0 of 10 DNS lookups
- DMARCTells receivers what to do with mail that fails SPF and DKIM: nothing (none), spam folder (quarantine) or reject.
- Quarantinesends reports
- MTA-STSRequires other mail servers to use encrypted connections (TLS) when delivering to this domain.
- Not published
- TLS reportsAsks other mail servers to report failed encrypted deliveries (TLS-RPT).
- Not requested
- BIMIA brand logo that some mail apps show next to authenticated mail from the domain.
- Logo published
DNS records
TypeNameValueTTL
Anotion.so208.103.161.175 min
Anotion.so208.103.161.165 min
Anotion.so208.103.161.25 min
Anotion.so208.103.161.15 min
AAAAnotion.so2602:f79a::25 min
AAAAnotion.so2602:f79a:0:1::25 min
AAAAnotion.so2602:f79a::15 min
AAAAnotion.so2602:f79a:0:1::15 min
NSnotion.sodana.ns.cloudflare.com1 day
NSnotion.sowoz.ns.cloudflare.com1 day
TXTnotion.so"_eohaffzltripfzavo0ehlmi84k0tkxw"5 min
TXTnotion.so"facebook-domain-verification=2agf76ffad9vxlxya597jrzil7xoxf"5 min
TXTnotion.so"google-site-verification=01Xid8U6cE4LuiG2OeRTL-hnDC9MxKvVD6mAgAS51Oo"5 min
TXTnotion.so"google-site-verification=LBOGI6TChsA_9vwaJYLU7RXgunDGAWKG0fcHxiU2-o4"5 min
TXTnotion.so"google-site-verification=U2r6h9FWkKMadZDxW94daNJ1YUGXP-9_tJ7PUYfYz4c"5 min
TXTnotion.so"google-site-verification=_aahlmtDiPlbg224pU3M_8w9Ka-3tcGUmBd6ZW052AU"5 min
TXTnotion.so"proxy-ssl.webflow.com"5 min
TXTnotion.so"v=spf1 ~all"5 min
TXT_dmarc.notion.so"v=DMARC1; p=quarantine; pct=100; rua=mailto:re+1b3a27dd30bc@inbound.dmarcdigests.com;"5 min
HTTPSnotion.so1 . alpn=h2 ipv4hint=208.103.161.16,208.103.161.17,208.103.161.1,208.103.161.2 ipv6hint=2602:f79a:0:1::1,2602:f79a:0:1::2,2602:f79a::1,2602:f79a::25 min
Exposure
Open ports
11 open- 80HTTP
- 443HTTPS
- 2082cPanel
- 2083cPanel
- 2086WHM
- 2087WHM
- 2096
- 8080HTTP alt
- 8100
- 8443HTTPS alt
- 8880
- Software
- Cloudflare
- Seen asHostnames Shodan has seen pointing at, or presented by, this address.
- msgstore.admin.notion.so
From Shodan InternetDB, updated weekly.
HTTPS
Certificate
Valid- Issuer
- Google Trust Services
- Issuing CA
- WE1
- Covers
*.dev.notion.so, *.notion.so, *.stg.notion.so +2 more
*.www.notion.so, notion.so- Also validOther unexpired certificates for this name, found in Certificate Transparency logs.
- 15 more certificates
Oct 11, 202690 days leftJan 10, 2027
From Certificate Transparency logs, via Cert Spotter.
Security
B- HSTSStrict-Transport-Security makes browsers refuse plain HTTP to this site. Preloaded sites are HTTPS-only even on a first visit.
- 1 year · with subdomainsPreloaded in browsers
- HTTP → HTTPSWhether the plain http:// address redirects visitors to the secure one.
- Redirects
- HTTP/3The newest HTTP, over QUIC. Announced in the alt-svc header or the domain's HTTPS DNS record.
- Not announced
- Encrypted helloEncrypted Client Hello (ECH) hides which site you're visiting from anyone watching the connection.
- Not published
- CAADNS records naming the only certificate authorities allowed to issue certificates for the domain.
- Any CA may issue
- security.txtA standard file (RFC 9116) telling security researchers how to report vulnerabilities.
- https://www.notion.so/Responsible-Disclosure-Policy-5f18bb6b86804eaf989c006131778b9c
Security headers 4 of 7
- HSTSpresent
- CSPpresent
- Framingpresent
- No sniffingmissing
- Referrerpresent
- Permissionsmissing
- Isolationmissing
Response
200 OK87 ms from CMHDNS lookup4 ms
301 notion.so333 ms
307 www.notion.so29 ms
200 www.notion.com87 ms
DNSConnect (TCP + TLS)Waiting for the replyFrom Cloudflare's CMH data center
Website
Page
The AI workspace that works for you. | Notion
Build Custom Agents, search across all your apps, and automate busywork. The AI workspace where teams get more done, faster.
- Language
- American English
Built with
- Hosting
- Vercelx-vercel-id header
- CDN
- Cloudflarecf-ray header
- Framework
- Next.jsx-powered-by header
Response headers
- age
- 5756
- cache-control
- public, max-age=0
- cf-cache-status
- DYNAMIC
- cf-ray
- a49794af3b31879c-CMH
- connection
- close
- content-language
- en-US
- content-security-policy
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https://ad.doubleclick.net/ccm/s/collect https://www.googleadservices.com https://googleads.g.doubleclick.net https://region1.google-analytics.com https://region1.analytics.google.com https://www.google-analytics.com https://cdn.metadata.io https://platformapi.metadata.io https://api-gw.metadata.io https://api.cr-relay.com https://d2hrivdxn8ekm8.cloudfront.net https://d1lu3pmaz2ilpx.cloudfront.net https://dvqigh9b7wa32.cloudfront.net https://d330aiyvva2oww.cloudfront.net https://verifi.podscribe.com https://verifi.pdscrb.com https://pixel.tapad.com https://ipv4.podscribe.com https://ipv4.pdscrb.com https://transcend-cdn.com https://telemetry.transcend.io https://wcs.naver.com https://api.statsig.com https://statsigapi.net https://exp.notion.com https://us1.gb-ingest.com https://api.box.com https://api.tailorhq.ai https://app.tailorhq.ai https://cdn.tailorhq.ai https://cached-api.tailorhq.ai https://*.mux.com https://api.sprig.com https://storage.googleapis.com https://cdn.sprig.com 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blob:;media-src blob: https: http: https://*.mux.com- content-type
- text/html; charset=utf-8
- date
- Mon, 12 Oct 2026 16:46:27 GMT
- referrer-policy
- strict-origin-when-cross-origin
- server
- cloudflare
- set-cookie
- notion_browser_id=ad1c21f2-ec05-43e9-a0ac-394d0bb946f6; Path=/; Expires=Tue, 12 Oct 2027 16:46:27 GMT; Domain=.notion.com
- set-cookie
- notion_check_cookie_consent=false; Path=/; Expires=Tue, 13 Oct 2026 16:46:27 GMT; Domain=.notion.com
- set-cookie
__cf_bm=0Z2wpLN7GZETGboyuH5Jr9KcJk_0EoE2LQMJBHxX5bY-1791823587.7307997-1.0.1.1-tVNVfwOx63aGzcyLoapZKZBCNcQiPBwZ_gY0U6bzJW38u4No03bpCMvdGnx8J8boYYA3Qup0QL89rnikLlq895_i6Jk17GemyfpShhboP2GyFTZgL2QNcrgtBMokQPch; HttpOnly; SameSite=None; Secure… Show all
__cf_bm=0Z2wpLN7GZETGboyuH5Jr9KcJk_0EoE2LQMJBHxX5bY-1791823587.7307997-1.0.1.1-tVNVfwOx63aGzcyLoapZKZBCNcQiPBwZ_gY0U6bzJW38u4No03bpCMvdGnx8J8boYYA3Qup0QL89rnikLlq895_i6Jk17GemyfpShhboP2GyFTZgL2QNcrgtBMokQPch; HttpOnly; SameSite=None; Secure; Path=/; Domain=notion.com; Expires=Mon, 12 Oct 2026 17:16:27 GMT- strict-transport-security
- max-age=31536000; includeSubDomains; preload
- transfer-encoding
- chunked
- vary
- accept-encoding
- x-device-class
- mac
- x-matched-path
- /en-us/product
- x-notion-global-experiments
- x-powered-by
- Next.js
- x-vercel-cache
- HIT
- x-vercel-id
- cle1::pdx1::bhgvj-1791823587748-b9a72e3e5da6
Tech stack
Built with Each entry says what gave it away: a response header, a cookie's name, an asset's path or file name, or markup the tool leaves in the page. Versions are checked against endoflife.date's support schedules and, for JavaScript packages, OSV's vulnerability database, which carries GitHub's security advisories.
Hosting
- Vercel
x-vercel-id header
CDN & edge
- Cloudflare
cf-ray header
Framework
- Next.jsPages Router
x-powered-by header
UI
- React
Next.js renders with React
Styling
- CSS Modules
23 CSS Modules class names
Fonts
- Notion Inter
self-hosted font
Build
- Turbopack
/_next/static/chunks/turbopack-1776xphsvpeb2.js
Bot protection
- Cloudflare Bot Management
__cf_bm cookie
How it's made
- RenderingPrerendered pages are built ahead of time and served as files. Pages rendered on each request are built by server code for every visitor. Pages drawn in the browser arrive nearly empty and depend on JavaScript, which most AI crawlers don't run. Islands are interactive parts in otherwise static HTML.
- Rendered on each requestNext.js getServerSideProps renders it on every requestPages Router
- Edge cacheWhether a CDN or proxy answered heade.rs's request from its cache, and how long ago that copy was made (the Age header).
- Not cachedCloudflare · made 2 hr ago
- Cache-Control
- public, max-age=0
- Server codeWhere the site's server code ran for this request, from the host's request ID. The edge location near heade.rs isn't shown: it's wherever the request came from.
- Portland pdx1Vercel Functions
- HTML
- 203.8 KB
- Data for scriptsData the server writes into the HTML so JavaScript can pick up where the server left off (hydration). Browsers download and parse all of it before the page responds, so large payloads slow pages down, even when the page looks ready.
- Next.js page data 12.8 KB · 6% of the HTML
- Scripts
- 41 files · 4 inline41 from other sites
Code from other sites Scripts a page loads from another domain run with the same power as its own code: they can read what visitors type and change the page. heade.rs checks what the HTML loads, not what tag managers add once they run.
- Integrity checksSubresource Integrity: the script tag carries a hash of the file, so the browser refuses it if the other site changes it. Analytics and tag manager scripts change by design and can't carry one; pinned library files can.
- 0 of 41 scripts
Details
Network
- IPv4
- 208.103.161.17
- ASNThe autonomous system number of the network that announces this address.
- AS33191
- Operator
- Notion Labs, Inc.
- PrefixThe block of addresses announced over BGP that contains this address.
- 208.103.161.0/24
- RPKIWhether a signed record (ROA) authorizes this network to announce this prefix.
- Valid
- VisibilityHow many bgp.tools peers carry this announcement.
- 3,051 peers
- Registry
- ARIN
Location
Country level- Country
- United States
- Continent
- North America
Registration
WHOIS- PopularityCloudflare Radar's ranking of domains by how often 1.1.1.1 users look them up.
- Top 2,000
- Registrar
- 1API
- Registered
- Mar 31, 201511 years ago
- Expires
- Mar 31, 2027in 5 months
- Updated
- Apr 24, 2026
- StatusRegistry flags on the domain, such as locks that stop unauthorized transfers or changes.
- ActiveclientTransferProhibited
- DNSSECDNSSEC signs DNS answers so they can't be forged on the way to you.
- Unsigned
- Name servers
- dana.ns.cloudflare.comwoz.ns.cloudflare.com
- Registrant
- Redacted for privacy
Mar 31, 2015170 days leftMar 31, 2027
AI & agents
Open to AI search, limits training
The crawlers behind AI search may come in, and robots.txt turns away Amazonbot.
Crawlers
Blocks 1 of 25TrainingSearchOn request
They visit a page when someone asks an assistant about it. ChatGPT's, Perplexity's, Meta's and Amazon's treat robots.txt as advisory;
Anthropic's and Mistral's follow it.
OpenAIGPTBotallowedOAI-SearchBotallowedChatGPT-Userallowed
AnthropicClaudeBotallowedClaude-SearchBotallowedClaude-Userallowed
GoogleGoogle-ExtendedallowedGooglebotallowed—
Microsoft—bingbotallowed—
AppleApplebot-ExtendedallowedApplebotallowed—
Perplexity—PerplexityBotallowedPerplexity-Userallowed
MetaMeta-ExternalAgentallowedMeta-WebIndexerallowedMeta-ExternalFetcherallowed
AmazonAmazonbotblockedAmzn-SearchBotallowedAmzn-Userallowed
MistralMistralAI-TrainingallowedMistralAI-IndexallowedMistralAI-Userallowed
OthersCCBotallowedBytespiderallowedDuckAssistBotallowed
- Can cite itThe AI products that can use the site in their answers: each answers from one crawler (OAI-SearchBot for ChatGPT search, Googlebot for AI Overviews, bingbot for Copilot), and robots directives on the front page, like noindex, nosnippet and noarchive, keep some out.
- ChatGPT searchClaudePerplexityAI OverviewsGeminiCopilotMeta AISiri
Reading
- Without JavaScriptText on the front page before any scripts run: what GPTBot, ClaudeBot, PerplexityBot and most agents read. Google, Bing and Apple's crawlers run scripts.
- 425 words
- MarkdownAgents like Claude Code, Cursor and OpenCode ask for Markdown in their Accept header. It's the page without its markup, so it costs them far fewer tokens.
- Not offered
- llms.txtA Markdown file listing a site's key pages for AI tools. Coding agents read it; search crawlers mostly don't.
- 48 links in 7 sectionsno title line
- Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
- None on the front page
Tools Ways an AI agent can do things on the site, not just read it: an MCP server that apps like Claude, ChatGPT and Cursor connect to, an API catalog, packaged agent skills, a shopping profile (UCP), or tools the page offers AI in the browser (WebMCP). heade.rs looks in the official MCP Registry and the files the site publishes under /.well-known/.
No MCP server, API catalog, agent skills, shopping profile or in-page tools found.