Who called from 5316002011

Number called and only rang once called back and no one picked up.

Hang up call after one ring and no response when I called back.

Called once, no msg left, ignored, blocked, forgotten.  So sick of these calls.

Standard protocol. Did not recognize the number so I did not answer. No message left by caller. Searched internet and looks like junk spam call. Blocked number.

Same thing just occurred on December 10, 2015:  Number called and only rang once called back and no one picked up.