Postcode areas 66XX
- Postcode area 6600
- Postcode area 6630
- Postcode area 6637
- Postcode area 6640
- Postcode area 6660
- Postcode area 6661
- Postcode area 6662
- Postcode area 6663
- Postcode area 6666
- Postcode area 6670
- Postcode area 6671
- Postcode area 6672
- Postcode area 6673
- Postcode area 6674
- Postcode area 6680
- Postcode area 6681
- Postcode area 6686
- Postcode area 6687
- Postcode area 6688
- Postcode area 6690
- Postcode area 6692
- Postcode area 6698