Techniques for managing access to resources utilizing call information are provided. Resources of like type can be pooled into resource groups and customers can then be sold a base amount of a resource, to be taken from the appropriate resource group, that the customer can then provide to users or callers. The server of the resources utilizes the telephone number of the party called and call type in order to identify the resource that is requested. If the base amount of the requested resource has already been allocated, an overflow amount can be utilized to provide additional resources of a like type, if they are available. Thus, the resources can be efficiently managed to allow a high utilization of the available resources.