You can block incoming calls from a specific incoming phone number or a country. To do that you can use the Branch component, which lets you compare values. To block calls, compare either the From number or the two-letter ISO-3166-1 alpha-2 country code for the country.
  1. Drag and drop the Branch component onto the canvas.
  2. In the Configuration tab
    • For Variable to compare, enter the value you’ll receive on the call.
      • To compare the caller ID, enter {{Start.call.from}}
      • To compare the country code, enter {{Start.call.from_iso2}}
    • For Operation, select “Is equal to.”
    • For the value to compare:
      • For caller ID, enter the caller ID you want to block — for example, 1-220-200-0000.
      • For country code, enter the code for the country you want to block — for example, NG for Nigeria or PH for the Philippines.
  3. Click Validate to save the settings. Now the branch node will have two output states:
    • No Match: When the values don’t match
    • CONDITION1: When the condition matches
    Condition names are editable. We recommend giving conditions logical names to make them easier to track.
  4. Connect the Incoming Call state of the Start node to the Branch node.
  5. Connect the No Match state of the Branch node to a Call Forward node.
  6. You can either leave the CONDITION1 node unattached or attach it to a Hangup node. Calls will be blocked in either case.
Block phone number setting: 
Block country setting: