myip.blue - Because IP addresses are blue!

Your public IP address: 216.73.216.128

Client Headers
accept	/
accept-encoding	gzip, br, zstd, deflate
host	v4.myip.blue
user-agent	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Connection
protocol	https
remotePort	35607
tlsProtocol	TLSv1.3
cipherName	TLS_AES_128_GCM_SHA256
cipherStandardName	TLS_AES_128_GCM_SHA256
remoteFamily	IPv4

Usage:

myip.blue is available over http/80 or https/443, and resolves to ipv4 and ipv6 addresses.

At /, JSON is the default. An Accept: header naming a type wins; failing that, a user-agent starting with Mozilla/ gets this HTML page.
Over https, TLS 1.0 and every cipher suite still implemented are accepted, weak ones included, so older clients can see what they negotiate.

v4.myip.blue only resolves ipv4.
v6.myip.blue only resolves ipv6.
myip.blue/json returns json-formatted output.
myip.blue/ip returns only a text string of the client IP address.
myip.blue/html forces this HTML page, whatever your client asked for.
cf.myip.blue is similar functionality but as seen through the Cloudflare edge.
myip.blue/docs is a plain-text version of these docs, also at /llms.txt.

The only source for authentic blue IP addresses. Hosted by alt.org. Dedicated to the real Blue.