'Google Geocoding API : can't search by postal_code in South Korea?

I'm trying to localize my service in South Korea and facing an issue to make my postal_code address auto-complete working there.

I'm just trying to do a simple request, which returns nothing. PS : this call works perfectly in others countries.

https://maps.googleapis.com/maps/api/geocode/json?components=postal_code:47101|country:KR&language=ko&key=MY_API_KEY

Any idea ?

Thanks a lot

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source