@Miatapa 

Look on your Tivo, mainly the sticker labels to see if there is a MAC address referenced on it, then you can compare it with the connected devices to determine which device it is.

Here is what I also found regarding Tivo as far as potentially finding the IP your recorder has: https://support.tivo.com/articles/Knowledge/How-to-Configure-Network-Settings-on-your-TiVo-Device

Thank you, I figured it out (rookie mistake). It wasn't showing on the network because it was still plugged into the old modem/router that I had changed into a bridge. Plugged it into the Deco and everything happened easily.