The World Boxing is a new body which is seeking International Olympic Committee (IOC) recognition to run the sport.
The national federations of Canada, Brazil, Argentina, Germany, Honduras and Sweden joined the body newly.
It was bringing the total number of members to 12.
New Zealand, Australia, England, Great Britain, the Dutch and the United States are already members.
The IOC has stripped the recognition of the Russian-led International Boxing Association over its failure to meet a set of governance, financial and sports reforms.