It’s important to communicate with your co-loader or carrier regarding the primary cargo control number (CCN). The master co-loader is responsible for providing the primary CCN to all co-loaders in the consolidation, several days prior to loading goods overseas. Each co-loader must also pass on the primary CCN to their own co-load customer. Usually, the co-loader will provide the primary CCN along with their own 8000 CCN, which may become the Previous CCN.