Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh interface ip show joins ?
Usage: show joins [[addr=]IP address]
addr - The IP address of a specific interface for which you want
to show multicast groups that it has joined.
Remarks: Displays IP multicast groups that have been joined by IP addresses
that have been configured for one or more interfaces. If an IP
address is not specified, multicast groups for all IP addresses
show joins addr=10.0.0.1