A couple of days back, I got a couple of sms alerts saying that a new device is now connected to your network. The names of the devices were MAC 34 and MAC 35 and their MAC addresses were likely locally administered MAC addresses or randomised MAC addresses, one started with C2 and the other with 36, and I was not able to trace it to any vendor. When I checked my jio app, I saw another device named MAC 30 and I ended up blocking all three devices. Later, I realised that MAC 30 is my Jio STB and unblocked it. I called Jio helpline but they just told me to block and change my password which I had already done. Could this be someone who successfully hacked into my network or just stray connection attempts or something else?