PostalCodes API

To ensure that only valid data is sent to DHL, the PostalCodes API should be used to validate all Swedish postal codes, postal codes outside of Sweden is generally not supported.

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.