What is a master airwaybill number?

A master airwaybill number (MAWB number) is a unique identifier assigned to a shipment transported by air freight. It is issued by the airline or freight forwarder and serves as a contract of carriage between the shipper and the airline. The MAWB number helps track the shipment throughout its journey and includes details such as the origin and destination, the shipper and consignee information, and specifics about the cargo. It is distinct from the house airwaybill number (HAWB), which is used for individual shipments within a consolidated cargo shipment.