Calls and asks for someone by the first name and then hangs up.  We do not answer calls from numbers unknown to us!  It is really annoying to be plagued with these calls.  If they really wanted something, they would leave a specific message.

This number calls us at least once a week and immediately hangs up as soon as the phone is answered. They are a disruption to a functioning business.

They called me and hung up.

Called me and said they were something to do with Cancer.  I said they could send me something in the mail.  They just hung up.