๐จ Time for #fridaygeotrivia ๐จ
Name countries (or parts of countries) that use the postal system of other countries.
An example: Liechtenstein ๐ฑ๐ฎ uses the Swiss ๐จ๐ญ postal system.
As always you need the emoji flag and #fridaygeotrivia hashtag for full points.
Rules/Prizes/etc on the blog: https://blog.opencagedata.com/post/geotrivia-july-2023