Who called from 3865387501

A man called the business I work for and asked if my boss was available and I asked him who was calling and he said George Lopez.  I asked to take a message and he said he would call back later...

My caller id identified the caller as "AASTFL". I was too late to pick up the phone. The caller already hung up by that time. What is "AASTFL"?

The caller asked for company's owner and when heard he is not available, he hung up.

When I answered whoever was on the line hung up

Caller hung up when I answered