Echoes the client address Cloudflare sees, plus optional geo and request metadata. Root returns plain text. Open /json, /xml, /yaml, /csv, /html, /headers, or /trace for the same lookup in another shape.
UR family
Small network tools
UR is a family of tiny public tools for IP and network work. Each app lives on its own host. Add a new entry to the catalog when another app ships.
Calculates CIDR fields for /{ip}/{prefix}: mask, network, broadcast, host range, first-octet address class, and shop-floor size (Class A=/8, Class B=/16, Class C=/24). Same format paths as URIP under each lookup.
API
2 apps. Offline copy is a single HTML file.