Various systems, mediums, and methods may involve a routing system. For example, the routing system may determine a user request for an item, possibly generated by the user's device, such as a smartphone device. The routing system may search for the item with a lead inventory system associated with one or more networks. The routing system may identify that the lead inventory system is out or out of stock with respect to the requested item. The routing system may also route the user request to one or more stocked inventory systems, possibly holding the requested item in stock. As such, the routing system may identify at least one stocked inventory system capable of providing the requested item from the inventory.