This is a Distributel long distance access number. Someone, who has a long distance package with Distributel, is calling their local access number and then calling you. The Call Display information doesn't show up as the actual caller, because they are calling a system that makes a call on their behalf.
Mysphyt hit the nail on the head. You're calling a call-distribution centre. It's NOT a telemarketer or anything like that, they ARE real people calling you. It just works by them calling one number which connects with yours after, to reduce long distance fees. When you call back, there's obviously no way for the system to know which of the thousands of Distributel customers you're trying to reach.