The answer you’re after:
New routers from Verizon and Xfinity have a “Hidden Network” as part of a new initiative to boost speeds without installing actual infrastructure. It’s a new way to extend signal to hard to reach places like the rural midwest where 1 tower is enough to supply a whole zip code by bouncing signal off routers in the neighborhood. To get rid of this “HIdden Network” you have to log into your Verizon, or Comcast account and Opt Out. You can do so in your account or call customer service. Someone from technical support will access your router, stop the Hidden Network, and you should see a small boost of 30mb in performance from your router.
Here are some additional information about what’s happening.
http://uproxx.com/technology/comcast-makes-customer-routers-public-wifi-points/
http://www.cnet.com/news/comcast-expands-wi-fi-network-with-new-neighborhood-initiative/
but I have Spectrum. Although my phone is a verizon dumb phone.