PostalCodes API

To ensure that only valid data is sent to DHL, the PostalCodes API should be used to validate all postal codes.

The API also has a function for finding the domestic routing / linehaul code, as well as the international gateway code which is to be used on the label. There is also support for retrieving a "list" of the Swedish postal codes that are updated after a specified date, for example to keep a local register updated with Swedish postcodes with routing codes etc. DHL Freight Sweden operates.