Here is their official list: https://dataplan.xfinity.com/faq/ https://dataplan.xfinity.com/faq/ Comcast doesn't consider local(ish) providers as competition,

Here is their official list: https://dataplan.xfinity.com/faq/ https://dataplan.xfinity.com/faq/ Comcast doesn't consider local(ish) providers as competition, this really only applies to Verizon etc.