A NASFiC is held in North America in any year where the Worldcon is outside of North America. Because there are currently no seated Worldcons outside of North America, no NASFiCs are currently scheduled. The next time a non-North American site is selected to host a Worldcon, the members of the following year’s Worldcon will vote to select the site of the NASFiC to be held in the year of that non-North American Worldcon
The NASFiC.org web site does not operate individual NASFiCs. Each NASFiC is operated by its individual operating committee, not by a central organization. The World Science Fiction Society does not operate NASFiC or Worldcon. It is only the sanctioning entity, and does not operate conventions. Contact each individual convention with questions about that convention.