Who called from 2056777500

They keep calling and hanging up most company's like that that are ok will say that they are calling for me at least

This number has called me several times and never leaves a message. I no longer answer any phone call from a number I do not know. Also if it was important they would leave a message. Caller ID = NAOCS Members. Looking it up this is an organization similar to AARP for seniors. http://naocs.us/