Wi-Fi Error: IP Address Conflict — What It Means & How to Fix It

What Does This Error Mean?

An IP address conflict means two devices on your network have been assigned the same IP address. Every device on a network needs a unique address — like house numbers on a street. When two devices share one address, both lose internet access or behave erratically.

Affected Models

Windows 10
Windows 11
Android
iOS
macOS

Common Causes

Two devices were assigned the same IP address by the router's DHCP server
One device has a manually set (static) IP address that clashes with a DHCP-assigned address
The router's DHCP address pool is too small for the number of devices on the network
A device went offline and came back with the same address another device now uses
Network equipment was recently changed or reconfigured, disrupting address assignments

How to Fix It

Restart your router. Unplug it from the wall for 30 seconds and plug it back in. This resets all IP address assignments and lets the router hand them out fresh.

Most IP conflicts resolve immediately after the router restarts and reassigns addresses.
On your Windows PC, release and renew your IP address. Open Command Prompt as Administrator and type: ipconfig /release — press Enter — then: ipconfig /renew — press Enter.

This tells Windows to give up its current address and request a new one from the router.
Check if any device on your network has a manually set (static) IP address. If so, change it to a higher number (like 192.168.1.200) that is unlikely to clash with automatically assigned addresses.

Static IP addresses set by users are the most common cause of persistent conflicts.
Restart the specific devices showing the conflict error — not just the router. This forces them to re-request addresses from scratch.

Both conflicting devices need to release and re-request their addresses.
Log into your router's admin page (usually 192.168.1.1 in a browser) and expand the DHCP address pool range. This gives the router more unique addresses to hand out.

Look for a setting called 'DHCP range' or 'IP pool'. Changing the end address from .100 to .200 doubles the available addresses.

When to Call a Professional

IP address conflicts are almost always fixable without professional help. If conflicts keep recurring on your network despite trying all the fixes, your router firmware may be buggy. Check the router manufacturer's website for a firmware update. If the router is old (5+ years), consider replacing it — new home routers cost $50–$150.

Frequently Asked Questions

How can two devices end up with the same IP address?

Normally, the router hands out unique addresses automatically. Conflicts happen when someone manually assigns a fixed address to one device, not knowing the router might assign that same address to another. They can also occur after a router restart if lease records were not saved properly.

Will an IP conflict slow down both devices or just one?

Usually both devices are affected — they fight over the same address and neither works reliably. You may see intermittent internet drops, slow speeds, or complete loss of connectivity on one or both devices.

Can I prevent IP address conflicts from happening again?

Yes. Make sure all devices are set to obtain IP addresses automatically (DHCP) rather than using manual/static IPs. If you do need a static IP for a device (like a printer), assign it an address outside the router's DHCP range so they never overlap.