BankBank code/prefixBranch range Bank of New Zealand02 or 080018 - 6599 ANZ01, 04, 06, 11 or 250001 - 8999 Kiwibank¹389000 - 9499 Westpac03, 13, 14, 16 -23, 270031 - 7355 ASB Bank12 or 243001 - 4340 The branch number ranges given is not a reflection of the actual number of ...