Where can I get postal codes for all countries?

Question

I once read about an open source database for postal codes with geolocation data but now I can\'t remember its name. Can someone help?

Answer 1

I'm currently using this one: https://www.back4app.com/database/back4app/zip-codes-all-countries-in-the-world it's free and very useful!

It's also possible to collaborate with this dataset, in order to improve it even more. :)