A method for allocating serial numbers among packaging sites includes receiving, from a packaging site, a query directed to a first server for the identity of a second server, providing the packaging site with information, from the first server, the information leading to the second server, receiving, from the packaging site, a query directed to the second server for the identity of a third server, providing the packaging site information, from the second server, the information leading to the third server. The method also includes receiving, from the packaging site, a query directed to the third server; and providing the packaging site at least one serial number from the third server.