Special callsigns during the FIFA World Cup
The National Telecommunications Agency has authorized Brazilian amateur radio operators to use special callsigns during the FIFA World Cup (12 June to 13 July). They will take the form of any individual callsign with a double prefix number, e.g. PY1AA = PY11AA, PP2ABC = PP22ABC, PY6XY = PY66XY, PT9MM = PT99MM