To block a specific WiFi network on your device, you must forget the saved profile or disable automatic connection settings. This prevents your computer from joining that SSID in the future. For router-level blocking, use MAC address filtering on the admin panel to deny access entirely.
Understanding Client-Side Blocking
Most users who want to block a WiFi network are actually trying to stop their own device from connecting to it. This is a client-side action. When you "forget" a network, you remove the credentials and configuration stored locally on your operating system. The network itself remains active for other devices, but your computer will no longer attempt to join it automatically. This is the most common interpretation of the request and is safe to perform without affecting other users on the same Wi-Fi.
If you have previously connected to a guest network, an old home network, or a public hotspot that you wish to avoid, removing this profile ensures privacy and prevents unintended data usage. It also stops background applications from searching for or negotiating connections with that specific SSID, which can save battery life on mobile devices.
How to Forget a Network on Windows
Windows provides a straightforward way to manage saved networks through the Settings application. Follow these steps to ensure your PC does not reconnect to the unwanted network.
- Open Settings: Press
Win + Ito open the Windows Settings menu. - Navigate to Network & Internet: Click on the Network & internet tile in the main list.
- Select Wi-Fi: In the left-hand menu (or main page in Windows 11), click on Wi-Fi.
- Manage Known Networks: Click on the link labeled Manage known networks. You will see a list of all WiFi profiles your computer has saved.
- Forget the Network: Find the network you want to block in the list. Click on it to reveal options, then select Forget. Confirm the action if prompted.
Once forgotten, Windows will treat this SSID as unknown. If you need to connect again in the future, you must manually re-enter the password and re-save the profile. This method is effective for both 2.4GHz and 5GHz bands provided they share the same SSID name.
Forgetting a Network on macOS
macOS handles network preferences differently, storing them in the System Preferences under Network settings. Removing a network here achieves the same result as on Windows.
- Open System Preferences: Click the Apple menu and select System Preferences.
- Go to Network: Click on the Network icon.
- Select Wi-Fi: Ensure Wi-Fi is selected in the left sidebar.
- Access Advanced Settings: Click the Advanced... button in the bottom right corner.
- Remove Preferred Networks: In the Preferred Networks tab, select the network you wish to block. Click the minus (-) button below the list to remove it.
- Save Changes: Click OK and then Apply to confirm the changes.
This removes the network from the priority list. macOS will no longer auto-join this SSID when it is in range. If the network is hidden, you may need to delete it from the Other section if it was added manually via Join Other Network.
Blocking at the Router Level
If your goal is to prevent anyone from connecting to a specific network, or to block a specific device from accessing your primary network, client-side forgetting is insufficient. You must configure your router. This requires administrative access to the router's web interface.
Log into your router using its IP address (commonly 192.168.1.1 or 192.168.0.1). Navigate to the Wireless or Security settings. Look for MAC Address Filtering. You can add the MAC addresses of unauthorized devices to a Deny list. Alternatively, if you are trying to block a neighboring network, note that you cannot technically "block" another person's SSID signal. However, you can change your own SSID and password to make it unique and secure, reducing confusion and unauthorized attempts.
For more details on managing connected devices, see our guide on handling Unknown Device on WiFi Network: Troubleshooting Guide. This resource explains how to identify and isolate suspicious connections before deciding to block them.
Why Your Device Keeps Reconnecting
Sometimes, forgetting the network does not stop it from appearing in your available list. This happens because the network is still broadcasting its SSID. Your device sees it, but since you forgot the credentials, it cannot connect. If you want to hide the network from your view entirely, you would need to change the broadcast settings on your own router, which is not possible for external networks.
Ensure that Auto-Connect is disabled for sensitive networks in your OS settings. On Android, go to Settings > Network & Internet > Wi-Fi, tap the gear icon next to the network, and toggle off Auto-suggest hotspots or Connect to open networks. This adds an extra layer of control beyond just forgetting the profile.
Frequently Asked Questions
Can I block a neighbor's WiFi network?
No, you cannot block another person's router from broadcasting its signal. You can only prevent your own devices from connecting to it by forgetting the profile. Attempting to jam or interfere with their signal is illegal in most jurisdictions.
Will forgetting a network delete my password?
Yes, forgetting a network removes all saved credentials, including the Wi-Fi password and security type (WPA2/WPA3). You will need to know the password to reconnect later if you choose to do so.
How do I stop my phone from asking to join a network?
On iOS, go to Settings > Wi-Fi, tap the i icon next to the network, and select Forget This Network. On Android, long-press the network in the Wi-Fi list and select Forget or Remove.
Is blocking a network the same as changing my password?
No. Changing your router password disconnects all devices and requires everyone to re-enter the new code. Blocking a network on your device only affects that specific device. To kick others off your network, change the router password instead.
What if I accidentally blocked my own WiFi?
If you forgot your own home network, simply search for the SSID in your Wi-Fi settings, select it, and enter the correct password again. The network will be re-added to your preferred list.