Customers were also taking to Twitter to reach out to the company about the possible outage.
As far as we can tell, the cut fiber line primarily affects those with Comcast or Xfinity services.
Comcast's verified Twitter account replied to some users complaining about a lack of service throughout the day Friday.
Many popular internet sites went down for awhile Friday when a fiber optic cable failed. "We apologize for the inconvenience".
This story will be updated as more information becomes available.
The shares were up 1.5 percent to $33.11 at 3:22 p.m.in NY. That's because other traffic travels across the provider's network, because it serves as part of the backbone connecting various regions of the nation.