
404 Rail Carrier Shipment Information
BNSF’s published 404 specification, rendered as an interactive guide. Expand any segment to see its elements, data types, lengths and accepted codes — then validate your own document against it below.
Specification
Validate a 404
Paste or upload a document and check it against BNSF’s published rules — segment order and repetition, required elements, field lengths, data types and accepted codes. Nothing is stored.
Go live on BNSF’s 404 in days, not months
Weredi maps this guide to your ERP, runs the test cycle with BNSF, and keeps the spec current as it changes.