To locate the IP address and MAC address for your Chromecast, open the Google Home app on an Android phone or tablet, iPhone or iPad. 

After opening the app, follow these instructions:

  1. Tap "Devices" at the top of the screen
  2. Locate the desired Chromecast 
  3. Tap the ‘3 dot’ icon/menu button for your device — It's located at the right of the device 

  4. Select Device Settings

The IP address and MAC address are located at the bottom of this screen.

Chromecast network information can also be located from within the Chrome browser on any operating system.