Abstract: Methods, systems, and computer program products for defining subcategories and associated contract number ranges within a standard issuance context category for a travel product. A stock allocation module includes a stock index table having a plurality of stock indexes each associated with an issuance context and at least one range of numbers. In response to a traveler purchasing a travel product, an issuance platform sends an allocation request to the stock allocation module. In response to receiving the allocation request, the stock allocation module identifies a stock index matching the issuance context of the pending transaction. The matching stock index is then used to identify the range of numbers corresponding to the issuance context. An available number is selected from the identified range of contract numbers and used to define a contract number. The contract number is then returned to the issuance platform.