Below is a list of APNs used for getting a public IP to a cellular device.


2 Degrees - 

Direct


Spark - 

direct.telecom.co.nz


Vodafone - 

Internet - Luck of the draw with this APN unfortunately. Not guaranteed to get public. 


Skinny - 

wapaccess.co.nz    


Vocus - 

www.callplus.net.nz