Comcast’s internet service was out across the U.S. on Monday for several hours

Comcast’s Xfinity internet service was down in many parts of the US on Monday.

A map from showed that outages were affecting states across the Northeast as well as cities like Los Angeles and Boston.

Comcast Outages


When the outage first began, the Comcast Cares Twitter account said the company was working on a fix, while the Comcast Business account replied to angry customers, saying it appreciated their patience.

At around 2:00 p.m. Pacific time, Comcast tweeted that all customers should be back up and running.

Later in the day, a Comcast spokesperson referred us to a Techcrunch story that reported the issue actually stemmed from “backhaul” provider Level 3. The company tweeted that the problem was caused by a configuration error that affected IP-based customers like Comcast. Level 3 did not immediately respond to a request for comment.