Postcode 6403
Grass Valley · Northam, Western Australia
6403 is the postcode of Grass Valley in Northam, Western Australia, Australia.
- Postcode
- 6403
- Local area
- Northam
- State
- Western Australia
- Country
- Australia
Place with postcode 6403
| Place | Local area | Location |
|---|---|---|
| Grass Valley | Northam | -31.637, 116.798 |
Near Perth
The nearest major city is Perth, about 95 km away.
Nearby postcodes
Frequently asked questions
Which places use postcode 6403?
Grass Valley.
Which local area and state is 6403 in?
Northam, Western Australia, Australia.
What is the nearest major city to 6403?
Perth, about 95 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.