Who called from 3144499981

I am on the "no call list". This number has called once or twice a day, every day since 10/28/15.
Never leaves a message. No one there when I answer.

Out of area caller id. Leaves no msg. Unknown caller.

Out of area caller id. Leaves no msg. Didn't bother calling back. Suspect a robo call as have had numerous scam calls from 314-449-xXxX plus don't know anyone in this area.

Received call from "Unavailable 314-449-9981".  I did not answer.  I started to add them to my Blocked Call List but they are already ON MY BLOCKED NBR List with AT&T!!!!  Any other suggestions to block this number?  They make weekly calls.

The # callled early in the freaking morning didn't leave a msg, never answer calls i don't know