This article explains what data will be returned to you when tracking by only a master bill of lading
The Vizion Ocean Freight Visibility API tracks containers on a container level no matter the input. When tracking a shipment with only the master bill of lading number Vizion will identify all containers associated with the bill of lading, create a reference for each, and provide updates for each container's active or most recent journey.
Details on how the Master Bill of Lading tracking works is available right here.
Our MBL v2 is on our roadmap for Q2 of 2022.