Might have to do with
http://isp-lists.isp-planet.com/isp-bandwidth/0212/msg00978.html (AOL vs Cogent Peering issue) ---Mike At 09:51 AM 18/12/2002 -0500, Dale Levesque wrote:
Anyone happen to have more information on the problems that have been happening with the peering between Cogent and Level3. Cogent gives the standard answer when you call support, but some more specific information would be great. Thanks Dale