Check the SD card as well. There is a number written on it. I am catching up on the days messages as I have been away from my PC all day today.
A bit of a heads up - mine didn't have a number written on the case or the SD card which leads me to believe that I got someone else's miner after they RMAed it.
Seriously.. It came from hong kong man.
Not all of them have a number on it. Default of the miner is 192.168.1.100
If your unsure of the address of the ip and your not great with linux. Download Advanced-ip-scanner. plug the lan cable from your miner into your computer an disable all other connections. Then run the app and you'll see the IP of the pi.