Why bother with PRO number tracking when you already have the BOL number? First, let us differentiate a BOL number from a PRO number.
When a shipment is booked, a BOL (Bill of Lading) is generated and it automatically comes with a BOL number. The BOL is usually prepared by the shipper or the Third Party (brokers or 3PLs) and given to the driver upon pick up. Carriers, on the other hand, assign a PRO number once a shipment is picked up. It is short for progressive number which is usually a 7 to 10-digit number used to track the movement of a shipment. This is paired with the Standard Carrier Alpha Code (SCAC) which is a unique four-character code set by the NMFTA. It helps identify a shipment as well as the carrier transporting it.