New Zealand landlines use five geographic area codes: 03, 04, 06, 07 and 09. The map groups Stats NZ regional councils into those broad areas; council borders do not always match telephone boundaries.
How to read the map. The fills show five broad landline areas: 03 South Island and Chatham Islands; 04 Wellington; 06 parts of the lower and eastern North Island; 07 Waikato and Bay of Plenty; and 09 Northland and Auckland. Mobile numbers beginning 02 are not geographic.
Regional overview, not exact phone boundaries. Stats NZ's 2025 regional councils provide the boundaries. They are grouped to the nearest broad telephone area, so some places cross the drawn lines: Wairarapa and Ōtaki use 06 rather than 04; Taumarunui and National Park use 07 rather than 06; Tuakau and Pōkeno use 09 rather than 07. The exact network areas are local calling areas, not regional councils.
Sources. Numbering: New Zealand Number Administration Deed, Number Register — geographic service codes 03XY, 04XY, 06XY, 07XY and 09XY. Code-region geometry: Stats NZ, Regional Council 2025 boundaries, served as GeoJSON by the Stats NZ Feature Service. Coastline: Toitū Te Whenua Land Information New Zealand, NZ Coastlines and Islands Polygons, Topo50 (1:50,000), CC BY 4.0.