wanted to check how owns this phone number.

I got a call today and a message was left. Caller advised he was with Green Tree Servicing (My mortgage company) and wanted to assist me with a HARP refinance loan. He provided my home address and said a couple of letters had been sent to me. I have received letters from them regarding a HARP loan. He left an 866 phone number and extension so I can return his call. I believe he gave his name as Ramon.