I have been called at least 15 times by this number. Of course I never answer. Just curious as to who is calling.

I missed the call. When I called back, I got a recording thanking me for calling "Donor Care Center." The recording stated they had called me on behalf of a non-profit organization. A quick online search revealed that Donor Care Center provides teleservices (such as fundraising calls) to non-profits.

I also got a call on my cell from this number.  Its a scam ... they represent themselves as debt collectors and try to get you to make (so called) late payments over the phone.  They used my mortgage in my example ... never ever had a late mortgage payment.  Its sad they can't shoe up and look for honest work.