Charter, Comcast, and Windstream got worse in December 2013

Road Runner (Time Warner Cable) had four of the U.S. U.S. top 10 for December 2013, adding up to more spam spewed than #1 Charter and way more than #2 Comcast.

Two out of three of Road Runner’s entries got worse, and one, AS11427 SCRR-11427, popped up from #27 to join the top 10 at #9.

PaeTec (Windstream) popped up from #45 to #3 with one week’s burst of spam.

Internap‘s AS12180 INTERNAP-2BLK dropped out of the top 10, plummetting from more than 5 million spam messages in November to none observed in the CBL data in December. Congratulations, Internap! Continuum Data Centers’ AS53264 CDC-LMB1 also did well, dropping from #10 to #57, down from 1.5 million to 0.25 million spam messages.