We've gotten phone calls from this number several times and when we answer, they hang up.  Frustrating!

these folks have called my number several times.  Each time they call they want me to corroborate my SSN and address.  I explained to them that this is private information and I would not discuss any part of it with them.  

Once they are told that no personal information can be corroborated, they refuse to state their business and leave the call.  Apparently they want to catch people off-guard and trick them into acknowledging old debts.

The caller said the company name is "Glass Mountain Capital"  Watch out for these folks.

Glass Mountain Capital Dept collector