Comcast is currently experiencing a nationwide outage in the US, which is why social media users complained that they could not connect to platforms such as Sony's PlayStation, Netflix, and Microsoft's Xbox Live. In essence, failure can cause problems for anyone using Xfinity as an ISP, regardless of which products, apps, or services they want to access.
According to Down Detector, there have been more than 1
Comcast confirmed on Twitter that the outage occurred was caused by one of its "big backbone network partners" who severed a fiber optic cable, which could affect other ISPs as well.
One of Comcast's big backbone network partners had a fiber-optic cut that we believe has impacted other vendors as well. It currently affects our business and private customers in the Internet, video and voice sectors. We apologize and work to restore the services as soon as possible
– ComcastCares (@comcastcares) June 29, 2018