Called, but it was dead silent, couldn't hear a thing, it was like there was no phone service hooked up at all.

I found from another site that this number is linked to Ford Motor Credit.

Have no business with that.  It's a solicitor or scammer one that shouldn't be calling someone on the do not call list.  Of course scammers & crooks don't care.
http://www.okcaller.com/9378476114