Who called from 5080000000

Tried to call them back, got message "Your call cannot be completed as dialed".  Some kind of scam.

Just came in on my cell, just the number, no other info.  Didn't answer, they didn't leave a message.

There was a message left from HP support, calling to see if my replacement part solved the problem, and if there were any problems returning the defective part. They also left a 800 number to return the call to them.

Same as John - HP support checking if I received a replacement part and if it solved the problem.  They left a voicemail with an 800 number to call them back if I needed to.

By the time I got to my phone, they had hung up, left no voicemail.  I called the number back and was told it couldnt be completed as dialed.