How to Fix IP Address Conflicts on Your Local Network
Fix an IP address conflict in minutes: renew the lease on Windows, macOS or Linux, find the device using the same IP, then stop it coming back with DHCP reservations. Step-by-step.
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FastIPInfo Blog
IP, networking & privacy, explained
Practical, jargon-light guides on IP addresses, online privacy, network troubleshooting and security — from the team behind the tools.
How to Find the Device Causing an IP Conflict
Track down the exact device that's using your IP address: read the ARP table, identify it by MAC vendor, check the router's DHCP list, and confirm with arping. Works on Windows, macOS and Linux.
Read article →Subnet Overlap: Fixing 192.168.1.x Conflicts Between Routers, VPNs and Offices
Your home router and your office VPN both use 192.168.1.0/24? Two routers fighting over the same range? Learn why subnet overlap breaks connections and how to renumber your network the right way.
Read article →Why Does My Device Have Two IP Addresses?
Seeing one phone or PC twice in your router, or an IP that keeps toggling? It's usually IPv4 + IPv6, Wi-Fi + Ethernet, or MAC randomisation — not a hacker. Here's how to tell which, and when it is a problem.
Read article →How Accurate Is IP Geolocation? What an IP Tracker Can and Can't Find
Can an IP address reveal an exact location? We explain how IP geolocation works, how accurate it is at country, city and street level, why results are often wrong, and what services like Google add on top.
Read article →IPv4 vs IPv6: The Privacy Implications You Should Know
IPv6 changes more than address length — it changes how trackable you are. Compare IPv4 and IPv6 privacy, learn about Privacy Extensions, and how to stay anonymous.
Read article →Website Tracking Beyond Cookies: Fingerprinting and Friends
Cookies are dying, but tracking isn't. Learn how browser fingerprinting, supercookies, ETags and other cookieless techniques follow you — and how to defend against them.
Read article →Understanding DNS Leaks and How to Prevent Them
A DNS leak can expose every website you visit even behind a VPN. Learn what causes DNS leaks, how to test for them, and concrete steps to plug them on any device.
Read article →Mobile IP Tracking: How Your Smartphone Reveals Your Location
Your phone leaks location through far more than GPS. Understand mobile IP tracking, carrier-grade NAT, Wi-Fi and MAC-based location, and how to reduce your footprint.
Read article →Advanced Router Settings to Optimise Speed and Security
Go beyond the defaults. A practical guide to the router settings that actually matter — channels, QoS, DNS, firmware, WPA3, guest networks and more — for faster, safer Wi-Fi.
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