I have been getting calls from this number.

Received a call today from this number.  Claimed to be RCA (revenue Canada Agency) and this was my final warning to attend to my legal matter concerning my tax return?  Police were coming to get me and I was going to jail.

Received a call from this number claiming to be US Magistrate giving me a final call about a criminal offence.

Received a call from this number claiming them to be the US Magistrate saying this was the final call after many attempts to reach me. It was the last chance they said to deal with this serious criminal offence.