Postal code 78400
This postal code maps to one municipality in the Yvelines (78) département:
The postal-code area for 78400 covers approximately 5,1 km². Postal code 78400 has 5 082 addresses listed in the Base Adresse Nationale. You can also download the BAN addresses for this postal code as CSV.
Frequently asked questions
What municipality does postal code 78400 correspond to?
Postal code 78400 corresponds to the municipality CHATOU.
What département is postal code 78400 in?
Postal code 78400 is in the Yvelines département (78).