Caller is ERC. They are using a phone pool. Number's collected so far (267) 443-6560, (267) 443-6591, (800) 725-7091.
They probably have a large block of numbers for the (267) 443-65xx No.
Just purchased this debt about 2 months ago...no better than the last people that had the debt-calling 2-3 times a day, every other day, yet no one is on the other end!