| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 20 | — | — | 4,252,277 | New Zealand | |
| 204 | — | — | 4,252,277 | New Zealand | |
| 21 | — | — | 4,252,277 | New Zealand | |
| 22 | — | — | 4,252,277 | New Zealand | |
| 23 | — | — | 4,252,277 | New Zealand | |
| 24 | Pleasant Point, New Zealand | Canterbury, New Zealand | 1,187 | New Zealand | Pacific/Auckland |
| 25 | — | — | 4,252,277 | New Zealand | |
| 26 | — | — | 4,252,277 | New Zealand | |
| 27 | — | — | 4,252,277 | New Zealand | |
| 28 | — | — | 4,252,277 | New Zealand | |
| 280 | — | — | 4,252,277 | New Zealand | |
| 283 | — | — | 4,252,277 | New Zealand | |
| 2885 | — | — | 4,252,277 | New Zealand | |
| 2896 | — | — | 4,252,277 | New Zealand | |
| 29 | — | — | 4,252,277 | New Zealand | |
| 3 | Christchurch | Canterbury, New Zealand | 363,926 | New Zealand | Pacific/Auckland |
| 4 | Wellington | Wellington Region | 381,900 | New Zealand | Pacific/Auckland |
| 6 | Palmerston North | Manawatu-Wanganui | 75,996 | New Zealand | Pacific/Auckland |
| 7 | Hamilton, New Zealand | Waikato | 152,641 | New Zealand | Pacific/Auckland |
| 9 | Auckland | Auckland Region | 417,910 | New Zealand | Pacific/Auckland |