Live streams on the NBCUniversal service have been blocked in some Maryland communities after the network said it would not allow users to watch live football games.
The move comes after the Baltimore Ravens and the New England Patriots were swept by the Washington Redskins in the AFC championship game on Sunday.
Maryland has more than 1 million NBC subscribers.
It also has a large number of people who live in the Washington, D.C., metro area.
In Baltimore, Comcast has the largest audience with nearly 4 million people.
The Baltimore Sun reported that Comcast blocked live streams for Baltimore residents on Wednesday after the team’s win.
The Ravens won their first game of the season, but the Patriots won the game.
NBC said that it was unable to determine what caused the block.
Live streams are blocked in the District, which includes Baltimore, in order to ensure that customers are not distracted by technical difficulties.
Maryland officials said they will begin monitoring Comcast’s Live streaming services to determine how the block affects customers.
Comcast did not immediately respond to a request for comment.