Postcode areas 30XX
- Postcode area 3000
- Postcode area 3001
- Postcode area 3010
- Postcode area 3012
- Postcode area 3018
- Postcode area 3020
- Postcode area 3040
- Postcode area 3050
- Postcode area 3051
- Postcode area 3052
- Postcode area 3053
- Postcode area 3054
- Postcode area 3060
- Postcode area 3061
- Postcode area 3070
- Postcode area 3071
- Postcode area 3078
- Postcode area 3080
- Postcode area 3090