Below covers how you can configure your local zones for the Network, or also how you can add zones that are officially not allocated to yourself, but you do actually serve.
The postal codes and depots that you assign in this table, will basically override the official "gazetteer"
Navigate to Locations -> Transport networks Tab for being able to add your local zones to the system.
Select the transport network where you would like to make adjustment/ setup of local zones and navigate to Owned postal codes
In the table, you will have options to insert the country code, the postcode and your depot code.
Use the table on the left for full postcodes and "starts with" postcodes,
Use the table on the right for inserting postcode ranges.
Default depot code will make sure the consignments to get assigned to the correct depot once the postcode can not be found in the below tables.
Save your changes after adding all the date
Note: If there is no depot setup for the collection and delivery points that are in your consignment, the default zone will be applied automatically.