Comcast Corp., the Philadelphia cable company, says it will buy back up to $1.3 billion in debt.

Qualifying notes, senior notes and debentures carry interest rates of 7.125 percent to 10.625 percent and have due dates from July 15, 2012 to Aug. 1, 2013.

The offer expires July 17, Comcast said.

On Monday, Comcast sold $1.5 billion of 10-year notes paying 5.7 percent interest, and 30-year debt paying 6.55 percent.    - Reid Kanaley