A failure of Comcast's Internet services hit a wide swath of the eastern U.S. on Sunday, and the company said the issue was a problem with its DNS servers.
Comcast told the Baltimore Sun that service was restored late Sunday night. Spokesman Bob Grove told the Sun that extra staff were brought in to fix the problem.
Earlier, Comcast spokesman Charlie Douglas told NBC News: "All other services are working properly. ... We certainly apologize for any inconvenience this may be causing our customers."
It was not clear how widespread the failure was. A technician who answered Comcast's customer service line told NBC News that there were significant Internet outages in Connecticut, Maryland, Virginia, Massachusetts, New York and New Hampshire.
Douglas said the "focus" of the outages was in the Boston and Washington D.C. areas.
Television and telephone service from Comcast was unaffected.
(Comcast is in final negotiations to buy NBC Universal; msnbc.com is a joint venture between NBC Universal and Microsoft.)