"The way New Zealanders have embraced this event has been fantastic and we are thrilled to be in this position, given the challenges we have faced."
France play Wales this weekend in the first semifinal at Eden Park on Saturday night, and New Zealand take on Australia in the second semifinal on Sunday, from 9pm.
About 7000 tickets in most seating categories are still available for the first semifinal.
Tickets for the All Blacks v Wallabies semifinal are exhausted, but a few hundred extra tickets are expected to go on sale this week.
"Now that the four semifinalists have been confirmed we expect strong demand for remaining tickets over coming days," said marketing and communications general manager Shane Harmon.
"It's all or nothing for these teams so we urge fans to move fast to secure their place at what will be two nail-biting encounters."
Tickets can be bought online at rugbyworldcup.com/tickets and at Ticketek outlets for the France v Wales semifinal and the Bronze Final.
Tickets for the final on October 23 can be bought through official travel and hospitality packages. The public ticket allocation is exhausted.
International Rugby Board chairman Bernard Lapasset said the attendance and atmosphere at cup games continued to be strong.
"I would like to thank New Zealanders for the outstanding support and passion for this tournament," he said.
"We are set for a thrilling finale to Rugby World Cup 2011 with two compelling semifinals set to take centre stage this weekend and a Northern Hemisphere versus Southern Hemisphere showdown guaranteed for the final."