If your router has MAC address filtering enabled, you'll need to add the MAC address of your Chromecast to the list of filtered devices. To find the MAC address of your Chromecast, follow the steps below:
Chromecast
Locate the MAC address during Chromecast setup
- From the "Connect to Wi-Fi" screen of the setup process, in the top right, tap More .
- Tap Show MAC Address.
Locate the MAC address after Chromecast setup
- Open the Google Home app .
- Tap and hold your device's tile.
- At the top right, tap Settings Device information.
- Under "Technical information," check your MAC address.
Chromecast with Google TV
- Turn on your Chromecast with Google TV.
- In the top right corner of your TV screen, select Settings System About Status MAC address.