malware - Lan local ip address of Android phone is constantly changing?

I believe I am a victim of malware on my phone.

I have already flashed a new ROM and reset my Samsung Galaxy S3 phone many times. Using a network logging app and a "network connections" app shows me the live connections coming from my phone.

My local wireless LAN is 192.168.x.x but I see the IP address change to 10.0.8.1and then reverting back to my local WLAN IP address.

I do not even route that subnet in my network so how am I getting that address? Using network ping apps, I can ping that 10.0.8,1 address from my phone. It's even happening to my other android phone (Gamsung Galaxy Note 3). The S3 is rooted and the Note is not.