Who called from 4803760583

Calling to collect money for homeless veterans.

Person sounds like a message machine as opposed to a person.
Hello, this is "John Davis."  He has called several times and when I ask who or why they are calling, they hang up.

[***] robo call again
These call and caller need to be killed!

No message left, I am blocking this caller

Whoever at this number never talks or leaves a message.  Our phone ID says 480-376-0583, our TV ID says 000-000-0000 as the caller number.