Public IP Identification
This guide covers what really matters in public IP Identification: concepts, context, limits and interpretations that often cause confusion.
The central topic is public IP Identification, the value is in understanding the correct interpretation, not only repeating a result.
Interpreting an IP, domain, port or vendor without checking scope and source. The fix usually starts by cross-check the result with the source, update window and infrastructure layer..
The nginx instance that receives your connection on jkit.tools knows your real IP and forwards it to the Next.js container via X-Real-IP. Our API reads that header and returns it. We do not use external APIs.
The main point is understanding public IP Identification in the right context instead of treating one isolated value as a complete answer.
A typical limitation is assuming that one identifier alone explains the entire environment.
Cross-check public IP Identification with source, conventions, freshness and practical goals before taking action.
Your IP and headers come straight from our own server (behind our nginx). To automatically check the secondary protocol (IPv4 or IPv6), the browser queries a public IP-echo service; no other data is sent. We do not call fingerprinting APIs or geolocation providers.