This article was previously published under Q149426
Ordinarily, you can set up to five IP addresses per network cardinstalled, under the settings for TCP/IP (in Control Panel, double-clickthe Network icon, then click the Protocols tab; on the Protocols tab,select TCP/IP Protocols, then click the Properties button; on the IPAddress tab, click Advanced...). However, it is possible to add more thanfive IP addresses to a network card by modifying the registry.
Windows NT 4.0 has no limitation on the number of IP addresses that can bebound to a NIC. The limitation is on system resources.
Use the Registry Editor (REGEDT32.EXE) to add your IP addresses and subnetmasks, as follows:
WARNING: Using Registry Editor incorrectly can cause serious,system-wide problems that may require you to reinstall Windows NT tocorrect them. Microsoft cannot guarantee that problems resultingfrom the use of Registry Editor can be solved. Use this tool at yourown risk.
Start REGEDT32.EXE and locate the following Registry subkey: