Customers of ours on Comcast are experiencing poor throughput to us when whatever location they're at takes a route to us via Level 3; Level 3 being one of our upstreams. I've set a community of 65004:7922 which is supposed to tell Level 3 to prepend four times to Comcast for our AS but the only route server I know of in comcast land (route-server.newyork.ny.ibone.comcast.net) is not showing the prepend. Is there another way for me to determine if Level 3 is really doing the prepend other than opening a ticket and asking them? I did try http://www.level3.com/LookingGlass/ and plugged in one of our IP's and see "Prepend_4_to_AS7922" so could they be prepending and comcast overriding or ignoring it? We have peering with another provider that's directly connected with comcast so I'd like to have traffic from them use that one instead. Thanks, David