I haven't been able to connect to the bo2 server since 2am EST. All of my friends can connect but I can't. I've rest my router, test my connections and they are all good. Can anyone tell me what else I can do? It would be greatly appreciated.
Was having the same problem, except for Black ops 1. Turns out I was banned, but do I have any clue why? Nope.
But contact Activision support. They'll be able to help.