This transaction set communicates dealer identification and operational details between trading partners in the automotive supply chain. Typically sent by manufacturers, distributors, or administrative entities to dealers or their representatives, it provides comprehensive dealer information including location, contact details, and operational parameters. The N1 (Name) segment establishes the primary dealer identity, while the N3 (Address Information) and N4 (Geographic Location) segments specify where the dealer operates. Additional operational context is captured through segments like DN (Dealer Effectivity), which indicates when dealer information becomes active, and DH (Dealer Hours), which documents operating hours.

Consider a scenario where an automotive manufacturer sends dealer information updates to a regional logistics coordinator. The manufacturer uses the DI128 to transmit that “Johnson Auto Parts, located at 456 Commerce Drive, Detroit, Michigan 48201, is effective as an authorized parts distributor starting January 1st, operating Monday through Friday, 8 AM to 6 PM.” The PER (Administrative Communications Contact) segment would include the name and phone number of the dealer’s operations manager for coordination purposes, while the R9 (Route Code) segment might indicate the dealer’s assigned service territory. This structured data enables the logistics coordinator to update their dealer network database and route inventory accordingly.