Hi ajai.sf,
Welcome to our forum and thanks for contacting us with your question!
Yes, you can use
postal-code with some of Highcharts Maps Map Collection maps. You can find the whole Highcharts map collection here:
https://code.highcharts.com/mapdata/
Check also the link below to get the full picture of using map collection:
https://www.highcharts.com/docs/maps/map-collection
If you don't find the relevant map you can create a custom one. You will find more information in the following links:
https://www.highcharts.com/docs/maps/cr ... r-highmaps
https://www.highcharts.com/docs/maps/cu ... ojson-maps
Feel free to ask any further questions,
Regards!