Hi guys,
I am making an app where admins can enter postcoderanges between 1000-9999. To make it easy for them i would like to show them which ranges are still available.
In the screenshot below you can see there is a range available between 2531 and 2599. This is the only range that is still available between 1000-9999.

How would i be able to display it like this:
Available zip ranges:
The datasource "Custom Entity [dbo].[PostcodeRange]" looks like this:
(There are duplicates because companies are related to the ranges)

I would need some kind of forall loop that checks for available ranges between start and end zip codes.
Best Regards,
Anthony