Who called from 3123456789

Just came back from being away for two weeks and found this number called along with the same number at the 912,512 and 612 area codes. I'm talking about several calls in two weeks. Extremely annoying.

Got two calls, both hang up...I blocked the # (*60) from shaw digital phone

I just got the call from 312-345-6789 with silence on the other end of the line. I'm in Nova Scotia

We got this call on Thursday evening and again on Sunday afternoon. No one answers, it is just an open line. Dialed *69 and was told the call was from 312-345-6789.

I am in Ontario, Canada.  Just received one of these calls and the person hung up after I said hello.  Is there any way to block these idiots?