Australia - https://www.donotcall.gov.au/
Canada - https://lnnte-dncl.gc.ca/en/Consumer/Register-your-number/#!/
United Kingdom - https://www.tpsonline.org.uk/
United States - https://www.donotcall.gov/index.html
Australia - https://www.donotcall.gov.au/
Canada - https://lnnte-dncl.gc.ca/en/Consumer/Register-your-number/#!/
United Kingdom - https://www.tpsonline.org.uk/
United States - https://www.donotcall.gov/index.html
Can’t do it, it’s not unusual I get important calls from unknown numbers