How to Fix Self-Assigned IP Address Error

A self-assigned IP address error occurs when your device cannot obtain a valid IP address from your router's DHCP server. This prevents internet access and typically appears as an IP address starting with 169.254 on Windows or a similar range on Mac.

1. Restart your network hardware. Power off your modem and router by unplugging them for 30 seconds. Plug in your modem first and wait for all lights to stabilize. Then plug in your router and wait 2-3 minutes for full startup. This clears temporary network conflicts that prevent proper IP assignment.
2. Renew your IP address on Windows. Press Windows key + R, type cmd and press Enter. In the command prompt, type ipconfig /release and press Enter. Wait for the process to complete, then type ipconfig /renew and press Enter. Close the command prompt and check your connection.
3. Renew your IP address on Mac. Click the Apple menu and select System Preferences. Choose Network, then select your Wi-Fi connection from the left sidebar. Click Advanced, then go to the TCP/IP tab. Click Renew DHCP Lease and confirm the action. Click OK and Apply to save changes.
4. Forget and reconnect to your Wi-Fi network. On Windows, go to Settings > Network & Internet > Wi-Fi > Manage known networks. Select your network and click Forget. On Mac, go to System Preferences > Network > Wi-Fi > Advanced, select your network and click the minus button. Restart your device and reconnect using your Wi-Fi password.
5. Reset network settings. On Windows, open Command Prompt as Administrator and run these commands in order: netsh winsock reset, netsh int ip reset, and netsh advfirewall reset. Restart your computer. On Mac, delete these files from /Library/Preferences/SystemConfiguration: NetworkInterfaces.plist, com.apple.airport.preferences.plist, and preferences.plist. Restart your Mac.
6. Check DHCP settings on your router. Access your router's admin panel by entering 192.168.1.1 or 192.168.0.1 in a web browser. Log in with admin credentials and navigate to LAN or DHCP settings. Verify DHCP is enabled and the IP address pool has available addresses. The pool should typically range from 192.168.1.2 to 192.168.1.254.
7. Manually assign a static IP address. If DHCP continues failing, assign a static IP manually. On Windows, go to Network Adapter settings, select Properties, then Internet Protocol Version 4. Choose 'Use the following IP address' and enter an unused IP in your network range (like 192.168.1.100), subnet mask 255.255.255.0, and your router's IP as the gateway. Set DNS to 8.8.8.8 and 8.8.4.4.