Keeps calling at random times

They call mostly during the day, and they leave no vmail. The only thing is, my caller ID says 911. They really shouldn't use that to get people to answer their phones.

Bill collectors

STARTS CALLING FROM 8:05 A.M., 3 TIMES IN AN HOUR, DOES  NOT LEAVE MESSAGE

This is 1st Financial collectors calling.  They use an automated calling system that will not stop calling until you respond by calling them back.  If the person they are looking for is not at the number they are calling, they still leave your phone on that automated dialer.  They need to be reported to the FTC or Attorney General's Office.  Maybe someone can get an exact mailing address for them, along with a legal business name.