First, let me say that I am an employee of Lucent Technologies, Inc. If you are interested in highly scaleable and fault tolerant IPAM, DNS and DHCP solution, we can offer VItalQIP. This depends on how much you need to move beyond a single hosts file or spreadsheet. The VitalQIP product is a centralized solution for the management of your IP address space, DNS and DHCP. As part of the application we also provide the Lucent DNS Server (BIND based) and the Lucent DHCP server. The system is integrated with Windows 2003 Domain Controllers, DNS and DHCP. This includes GSS-TSIG authenticated Dynamic DNS Updates. From an administrative control perspective, the management UI allows for very granular control of access, down to the individual IP address. The software runs across a range of operating systems and hardware platforms. Let me know if you have any further questions. Frank Jennings fjennings@lucent.com http://www.lucent.com/vital