B1 Beginning Segment for Booking or Pickup/Delivery
To transmit identifying numbers, dates, and other basic data relating to the transaction set
Standard Carrier Alpha Code
B101 is the Standard Carrier Alpha Code (SCAC) of either the carrier receiving the booking request or the carrier sending the booking confirmation.
Identification number assigned to the shipment by the shipper that uniquely identifies the shipment from origin to ultimate destination and is not subject to modification; (Does not contain blanks or special characters)
Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year
B103 is either the date of the booking request or the date the booking was accepted by the carrier.
Code identifying action on reservation or offering
Code indicating a Yes or No condition or response
If B105 is "Y", partial loadings are allowed. If B105 is "N", partial loadings are not allowed.
Code indicating the reason for declining a shipment or work assignment
B106 should be sent if the B104 action code is a "D" for decline.