Weird notification on Cox App

Hello guys, 

I been get pop ups on my cox wifi app saying that " A new device Sagemcom has connected to your home network" Now I do not recognize that device at all, I googled that device and it comes up as a router for some kind. I called Cox multiple times and was told that they were not to sure what it is. Now I have reset my wifi pass and also did a default to my modem/router (I have the white gig blast one) after that was done I got 15 pop ups on the wifi cox aps saying that " A new device called BE31472D6EB5 has connected to your home network. They are all not the same numbers all 15 are different. They are not Mac address and I did verify that with reps from cox. Today I got another popup from that Sagemcom device again has connected to my network.  All 15 pop ups on the cox app about devices connecting did not come in at the same time. I am not sure if my router is hacked or if this is a cox issue. The cox app has notified me about them blocking a website 4 times on 4 different devices 2 phone and 1 PC and 1 Pad. The website is called H.parrable.com. I never have gone to that website at all and from what I am seeing it is malware. Not sure what to do.