What Your IP Address Actually Reveals (A Developer's Perspective)

Every HTTP request carries the sender's IP address, which reveals more than just geography—including ISP, organization, ASN, connection type, and proxy usage. IP geolocation is accurate to the country level (99%+) but drops significantly at the city level (50-80%), with mobile and VPN IPs being particularly unreliable. Beyond location, IP lookups expose organizational ownership via WHOIS data and ASN, enabling developers to categorize traffic for rate limiting, fraud detection, and access control.