Australia is divided geographically into a small number of large area codes, some of which cover more than one state and territory.
However, allowances are made for regional variations; sometimes the codes do not strictly follow state borders.
For example, Broken Hill in New South Wales uses the 08 area code, due to its closer proximity to Adelaide than the state capital Sydney, and Broken Hill area's inclusion in the Australian Central Standard Time zone.
This means it is the cost of a local call to phone the Gold Coast in neighbouring Queensland, since the metropolis covers both sides of the NSW/Qld border.
The dialing plan used in NZ reflects the national structure implemented by the New Zealand Post Office prior to the privatisation of the telecommunications services (and the creation of the Telecom New Zealand corporation).
Domestic phone numbers with a first digit in range 2-8 are generally managed by Telecom.
There are five regional area codes in use for landline calls, For example, a domestic toll call destined for a South Island location requires the dial prefix '03', being domestic-long-distance + 3 for the South Island.