Issues with hackers?

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@Brewsters_mom wrote:

Hello all, I was logging into Xfinity to check my balance, when I asked to enter a code that was sent to my phone. I entered the code, and my antivirus program alerted me that the site I was being sent to wasn't secure. I looked, and the Xfinity address had changed from xfinity.com to xfinity.net. This is something I've never seen before. Is this something new or are hackers actually trying to get customers' information? 

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https://www.whois.com/whois/xfinity.net shows that the domain is registered to Comcast Corporation the same as the xfinity.com domain.  From what device/app were you logging into your account?  What is the antivirus program on your phone?