One aspect of Internet services which will be notably affected by a move to either "supernetted" class-C network numbers or subdivided class-A's will be the mechanism used for address-to-name translation: the IN-ADDR.ARPA zone of the domain system. Because this zone is delegated on octet boundaries only, any address allocation plan which uses bitmask-oriented addressing will cause some degree of difficulty for those which maintain parts of the IN-ADDR.ARPA zone.