I just got a call from this number. My phone is stupid (SO many reasons!), and when I hit the answer button, it didn't answer. I subsequently missed the call, of course. io answered that it is from Diamond Resort, a time share company. I did stay with them in Branson, MO a few weeks ago, so it makes sense that it would be the Diamond Resorts.

This is from Diamond Resort a Time share company from Las Vegas

Called me, hung up when I picked up.  When I called back, it went to answering message that said "If you want to refinance your home...".  I hung up.