[HXFIVE]

A few others have pointed it out already, but you're quite misinformed (not uncommon, most Australians assume NZ has worse internet connectivity).

NZ has a nationwide copper network owned by NZX listed company Chorus, and there is a gigabit fibre network nearing completion (Chorus and about 3 other companies). Network owners are prohibited from retailing and must provide retail ISPs access on fair terms (wholesale pricing is regulated).

There are a few Australian owned ISPs, but none that operate in both Australia and NZ.