AFRINIC does not guarantee that any address space it allocates will be globally routable. This is because the filtering policies implemented by transit providers around the world are beyond our control. The best way to avoid filtering problems is to ensure that your network is numbered into the address range of a larger network so that many addresses can be aggregated and announced globally as a single route. The shorter prefix of such a global route will increase its chances of being unaffected by the filtering policies of large transit providers. We have carried out extensive tests to ensure that the minimum allocation (/22) from AFRINIC blocks is not filtered.