Who called from 3475174930

This numver keeps calling and when we answer no one answers. When we try to call back it's busy.

Just got a call from this number.  My caller ID gave the number and under the number said Dispatch Service.

A man has called our school from this number several times and is very demanding and bullyish. He asks for one of our employees and though he's been told several times not to call here as this is a school, he continues. He gives his name as Alfredo Ibarra. Our caller ID shows 347-517-4930 and he gave the number of 800-385-3314. I told him today not to call here anymore or I would be reporting him to our attorney.