DHL Express is a division of the German logistics company Deutsche Post DHL providing international express mail services.
Deutsche Post DHL is the world's largest logistics company operating around the world, particularly in sea and air mail.
Tracking numbers are numbers given to packages when they are shipped. Tracking numbers are useful for knowing the location of time sensitive deliveries.
DHL Express supports the carrier-independent ISO standard 15459-1 for the identification of single packages. Such identifiers consist of upper-case characters and numerals, and they can be up to 35 digits long. Companies that already use this standard do not require an additional identifier to track their pieces when shipping with DHL Express. In addition, DHL Express uses numeric identifiers of exactly ten digits to track transport orders (i.e. an order to transport a shipment consisting of one or more pieces from A to B). Customers can use both codes for tracking purposes.
DHL shapes up its ocean freight technology with "Ocean Secure". Customers can choose between container tracking along key milestones, monitoring of any opening of the container, or of temperature and humidity in the container leveraging the DHL SmartSensor GSM technology as well as real-time and in-transit information for all container parameters from remote areas and at sea through satellite transmission.