Sep 19, 2012
NCO Financial Systems, caller id: NCO
They never bother to leave any kind of a message, so now they're blocked. At my house, no message means you didn't actually want to talk with anyone. Do it again and you're blocked.
Posts for some of their other numbers indicate they may be calling on behalf of Credit One Bank. They're bottom-feeders, so it would be absolutely no surprise if Credit One Bank is using them, since they're bottom-feeders, too.