What is a PRO Number Used for When Shipping LTL Freight?  At
ShippingDiscounts.com, we are routinely asked to provide a PRO
number when calling our partner LTL carriers and tracking LTL
freight shipments for our customers. So, what is the definition
of a PRO number? A PRO number is a series of numbers used by
carriers as a reference for freight movement. The term “PRO
number” is short for progressive number. This series of numbers
is used as a tracking tool. PRO numbers are usually 7 to 10
digits long. PRO numbers are usually paired with a SCAC code to
form a longer barcode. The SCAC code identifies the carrier with
a unique four letter combination, as set by the National Motor
Freight Traffic Association. The SCAC code is then followed by
the PRO number of 7 to 10 digits to ultimately create the longer
barcode.  This barcode sticker consisting of the SCAC code and
the PRO number is then placed on the pallets where it can be
easily recognized for shipment. These PRO numbers are then
scanned and used for track