How do you call a new zealand number from an Australian mobile?

Dial +64 then the area code then the number. For mobile numbers leave off the initial 0 (e.g to call 021 1112222 you would call +64 21 1112222. Mobile phones do not have area codes.) The main city area codes for landlines are Auckland 9. Wellington 4. All of the South Island 3 Hamilton 7 Palmerston North 6.