code: public static boolean isValidRoutingMulticast(final InetAddress address)
  	{
  		return address != null && address.isMulticastAddress()
  				&& toLong(address) >= toLong(Discoverer.SYSTEM_SETUP_MULTICAST);
  	}
docs: Checks whether the supplied IP address is a valid KNX routing multicast address.
  <p>
  
  @param address the IP address to check
  @return <code>true</code> if address qualifies as KNX multicast, <code>false</code>
  otherwise