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 valid
172.253.151.0/24
Seen by 3,592 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
From Columbus on Anthropic, PBC
YouColumbus
google.comUnited States · — ms
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
AS15169Google
#HostNetworkLocationRound trip
AS
⋮
Waiting for a reply——*
Tracing from a probe near you with Globalping. Hop locations that its round-trip times rule out are left off the map.
The front page answered 429, so only what the response headers and cookies say is shown here.
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.
Nothing recognizable in its headers, cookies or markup.
Its bot protection refused heade.rs (429), so agents that fetch pages for people probably get the same answer.
Crawlers
Allows all
TrainingSearchOn 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.
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.
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.
Page couldn't be read
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.
Page couldn't be read
llms.txtA Markdown file listing a site's key pages for AI tools. Coding agents read it; search crawlers mostly don't.
Not published
Structured dataschema.org JSON-LD in the page: facts about the site in a form machines read directly.
Page couldn't be read
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.