IP & Networking
Everything about IP addresses, geolocation, ISPs, and how internet routing works.
REMOTE_ADDR vs CF-Connecting-IP: Getting the Real Visitor IP Behind Cloudflare
If your WordPress security plugin or PHP app logs the wrong IP behind Cloudflare, here is why β and how to read the real visitor IP safely using CF-Connecting-IP instead of REMOTE_ADDR or the spoofable HTTP_CLIENT_IP header.
Looking for an ipify Alternative? Free IP APIs Compared (2026)
The ipify open-source repo has been quiet since 2018 and geolocation costs extra. Here are the best free ipify alternatives in 2026 β including a drop-in replacement with free geo data.
Why Is My IP Showing the Wrong Location?
IP geolocation isn't perfect. Learn why your IP address might show the wrong city or country, and what factors affect the accuracy of location data.
What Is My IP Address? The Complete Guide
Your IP address is the unique number that identifies your device on the internet. Learn what an IP address is, what it reveals about you, and how to find yours instantly.
What Is IPv6? Why the Internet Needed a New Address Format
IPv6 is the successor to IPv4, designed to solve the global IP address shortage. Learn how IPv6 works, how it differs from IPv4, and why it matters for your connection.
How Does IP Geolocation Work?
IP geolocation maps your IP address to an approximate physical location. Learn how it works, how accurate it is, and why your IP might show the wrong city.
What Is an ISP and What Does It Know About You?
Your Internet Service Provider (ISP) is the company that connects you to the internet. Learn what an ISP is, what data it can see, and how to protect your privacy.