Fiber Cuts Cause Major Outage at Cogent

Substantial parts of Cogent Communications’ network are offline, with the company attributing the outages to a pair of fiber cuts. Cogent says the outage is regional and focused on the Southeast United States, but the company’s home page is not responding from any of our seven monitoring stations around the globe. One of the fiber cuts is between Philadelphia and Washington, D.C. and the other is between Houston and Tampa, according to updates on a network operators mail list. Here is a performance chart for the Cogent home page at


A dynamically updating chart of the site performance for is available here.