“We’re working to restore services to all areas as quickly as possible,” Time Warner’s online customer care team said in a tweet. The verified Twitter account said further Tweets would be delayed while the issue was being addressed. A Twitter handle owned by the parent company hasn’t yet addressed the issue.

In an e-mailed statement, Time Warner Cable told Fortune that during routine network maintenance this morning, “an issue with our Internet backbone created disruption with our Internet and On Demand services.”

“As of 6 AM ET, services were largely restored as updates continue to bring all customers back online,” a spokesman said in the statement.

Time Warner Cable has more than 14 million customers and is among the largest providers of video, high-speed data and voice services in the U.S. Many of the company’s residential and business customers are located in five geographic clusters–New York, the Carolinas, southern California, Texas, and the Midwest (which includes Ohio, Kentucky and Wisconsin). The company earlier this year agreed to be acquired by larger rival Comcast (CMCSA) in an all-stock deal worth $45 billion.