NLS (National Logistics Services) X12 846 Inventory Inquiry/Advice

A NLS (National Logistics Services) EDI 846 is used to communicate inventory levels between trading partners. Depending on the direction, it can be an inventory inquiry from NLS (National Logistics Services) asking for your current stock levels, or an inventory advice from you reporting available quantities. The document contains item identifiers (UPC, SKU), quantity on hand, quantity available, and location details. NLS (National Logistics Services) uses 846 data for demand planning, replenishment, and dropship availability. Stacksync sends 846 updates automatically from your inventory system, keeping NLS (National Logistics Services)'s records current without manual reports or portal uploads.

NLS (National Logistics Services)'s required frequency for EDI 846 updates depends on the fulfillment model. Dropship programs often require daily or even intraday inventory feeds — some NLS (National Logistics Services) divisions expect updates every 4 to 6 hours to minimize overselling. Warehouse-replenishment programs may accept weekly 846 updates. Stacksync monitors your inventory system for stock level changes and can send 846 updates on a scheduled interval or when quantities change beyond a configurable threshold, ensuring NLS (National Logistics Services) always has accurate availability data without overwhelming their systems with unnecessary transmissions.

Most NLS (National Logistics Services) dropship programs require EDI 846 Inventory Advice to prevent overselling — if you sell products through NLS (National Logistics Services)'s marketplace or website, they need real-time visibility into what you can actually ship. Without accurate 846 data, NLS (National Logistics Services) may list items as available that are actually out of stock, leading to order cancellations and poor customer experience. Stacksync integrates directly with your warehouse management system to push 846 updates automatically whenever stock levels change, ensuring NLS (National Logistics Services)'s product listings always reflect your actual fulfillment capacity.

When an item reaches zero available quantity in your EDI 846, NLS (National Logistics Services)'s systems typically remove it from available-to-sell inventory. For dropship, this means the product page may show 'out of stock.' For replenishment, it signals that NLS (National Logistics Services) should hold off on ordering until stock is replenished. It is important to send a zero-quantity 846 rather than simply omitting the item — omission may be interpreted differently by NLS (National Logistics Services)'s system. Stacksync handles zero-quantity items explicitly and can optionally suppress items below a safety stock threshold to prevent overselling.

Stacksync connects to your inventory management system, WMS, or ERP and pulls real-time stock data including quantity on hand, available-to-promise, and backorder quantities. The platform formats this data into the 846 document structure with proper UPC/SKU identifiers, location codes, and quantity qualifiers. You configure the transmission schedule — hourly, daily, or event-triggered — and Stacksync handles the rest. The platform also tracks NLS (National Logistics Services)'s inventory receipts so you can identify discrepancies between your reported inventory and what NLS (National Logistics Services) has actually received.