'Test if the address is otherwise IETF reserved.
Returns:
A boolean, True if the address is within the
reserved IPv4 Network range.'

@property
def is_reserved(self):

    reserved_network = IPv4Network('240.0.0.0/4')
    if isinstance(self, _BaseAddress):
        return (self in reserved_network)
    return ((self.network_address in reserved_network) and (self.broadcast_address in reserved_network))
