B1 Beginning Segment for Booking or Pick-up/Delivery

To transmit identifying numbers, dates, and other basic data relating to the transaction set

Position: B1-01 · Element: 140 · Name: Standard Carrier Alpha Code · Type: Identifier (ID) · Requirement: Optional · Min: 2 · Max: 4 · Repeat: -

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.

Position: B1-02 · Element: 145 · Name: Shipment Identification Number · Type: String (AN) · Requirement: Mandatory · Min: 1 · Max: 30 · Repeat: -

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)

Position: B1-03 · Element: 373 · Name: Date · Type: Date (DT) · Requirement: Optional · Min: 8 · Max: 8 · Repeat: -

Date expressed as CCYYMMDD

B103 is either the date of the booking request or the date the booking was accepted by the carrier.

Position: B1-04 · Element: 558 · Name: Reservation Action Code · Type: Identifier (ID) · Requirement: Optional · Min: 1 · Max: 1 · Repeat: -

Code identifying action on reservation or offering

Position: B1-05 · Element: 1073 · Name: Yes/No Condition or Response Code · Type: Identifier (ID) · Requirement: Optional · Min: 1 · Max: 1 · Repeat: -

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.

Position: B1-06 · Element: 1658 · Name: Shipment or Work Assignment Decline Reason Code · Type: Identifier (ID) · Requirement: Optional · Min: 3 · Max: 3 · Repeat: -

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.