Your connection

You didn’t tell me any of this. It all came from the connection your browser just opened to reach this page — which is roughly what every server you visit can see.

Your address

216.73.217.51

This is IPv4. The original 1981 addressing scheme. We ran out of these in 2011 and have been improvising ever since.

Your network

AS16509 — Anthropic, PBC

An autonomous system: one organisation’s slice of the internet. There are roughly 75,000 of them, and they spend all day telling each other which addresses they can reach. That constant negotiation is BGP, and it is the closest thing the internet has to a nervous system.

You reached

ORD — you look like Columbus, Ohio

The Cloudflare edge location that answered you, out of hundreds worldwide. You didn’t pick it; routing did.

Protocol

HTTP/2

HTTP/2 — many requests multiplexed over one connection instead of queued one behind the other.

Encryption

TLSv1.3 · AEAD-AES256-GCM-SHA384

Negotiated in the first fraction of a second, before a single byte of this page moved. Nobody between us can read it.

Round trip

~12 ms

How long a packet takes to get from you to the edge and back. Light in fibre covers about 200 km per millisecond.

Your client

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

The identifying string your browser or client sends with every request. It’s entirely self-reported — nothing on the wire verifies it, so it’s also the easiest of these facts to fake.

None of this is logged or stored. It is read off the live connection and discarded when this response finishes. There is no database here, and no cookie was set.

Prefer a terminal? curl https://aurelien.goulon.net/whoami
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