Index: twisted/words/test/test_irc.py
===================================================================
--- twisted/words/test/test_irc.py	(revision 38290)
+++ twisted/words/test/test_irc.py	(working copy)
@@ -2001,6 +2001,23 @@
         return transport.value().split('\r\n')[-2]
 
 
+    def test_channel_list(self):
+        """
+        L{IRCClient.channel_list} sends LIST command to the server
+        """
+        self.protocol.channel_list() #for getting list of all the channels from the server
+        self.protocol.channel_list("#foo") # specifying channel name
+        self.protocol.channel_list("#foo", "server") #specifying channel name and target both
+
+        expected = ["LIST", 
+                    "LIST #foo", 
+                    "LIST #foo server",
+                    '']
+
+        self.assertEqual(self.transport.value().split('\r\n'), 
+                                                       expected)
+
+
     def test_away(self):
         """
         L{IRCClient.away} sends an AWAY command with the specified message.
Index: twisted/words/protocols/irc.py
===================================================================
--- twisted/words/protocols/irc.py	(revision 38290)
+++ twisted/words/protocols/irc.py	(working copy)
@@ -1815,6 +1815,64 @@
         return nickname + '_'
 
 
+    def channel_list(self, channel=None, target=None):
+        """
+        The list command is used to list channels and their topics.  
+        @type channel: C{str}
+        @param channel: If the channel parameter is used, only the status of that channel is displayed.
+
+        @type target: C{str}
+        @param target: If the target parameter is specified, the request is forwarded to that server which will generate the reply.
+        
+        """
+        if channel and target:
+            self.sendLine("LIST %s %s" % (channel, target) )
+        elif channel:
+            self.sendLine("LIST %s" % (channel))
+        else:
+            # print "Sending list"
+            self.sendLine("LIST")
+
+
+    def irc_RPL_LIST(self, prefix, params):
+        """
+        Called when we get LIST of channels from the server, output of LIST Command
+        """
+        # print "In irc_RPL_LIST"
+        # print "prefix : %s" % (prefix)
+        # print "params : %s" % (params)
+        #deleting nick from params,so that params will contain channel name,number of users on the channel and topic of the channel
+        del params[0]
+        self.gotChannelList(params )
+
+
+    def irc_RPL_LISTEND(self, prefix, params):
+        """
+        Called when output of /LIST ends
+        """
+        # print "prefix : %s" % ( prefix )
+        # print "params : %s" % ( params )
+        del params[0]
+        self.channelListEnd(params)
+
+
+    def gotChannelList(self, params):
+        """
+        @type params: C{[str, str, str]}
+        @return a list like this: [channel, number of users, topic of the channel] 
+        """
+        return params
+
+
+    def channelListEnd(self, param):
+        """
+        Returns End of /LIST
+        @type param: C[{str}]
+        @return : C{str}
+        """
+        return params[0]
+
+
     def irc_ERR_ERRONEUSNICKNAME(self, prefix, params):
         """
         Called when we try to register or change to an illegal nickname.