Often large enterprise environments simply want to collect host inventory data, as well as host-to-LUN mappings, for capacity reporting—particularly allocated capacity chargeback reporting. The necessary host data can be mined directly from switches rather than running a full host data collection. This zone alias data collector leverages zone alias and IP address data, available from a switch, to identify the WWN of a host. The host WWN, in turn, maps to a LUN on an array to locate the storage that is being used by a host, as shown in the following diagram.