Honorifics may be prefix, suffix, or replacement types. They are prefixed by a zero, followed by the zone prefix. To convert integer decimals to octal, prefix the number with "0.". CIDR notation is a compact representation of an IP address and its associated routing prefix. IPv6 uses the address block with the prefix for multicast. Number is indicated by replacing the singular prefix with the plural prefix. Verbs without a prefix are usually imperfective. Thus the first binary prefix was born. The first digit of the "zone prefix" of a mobile number is always '4'. DIN 476 provides for formats larger than A0, denoted by a prefix factor. Pairs are usually formed by a prepositional prefix and occasionally a root change. Expressways are being assigned numbers with the E prefix. A further 243 networks advertised only an IPv6 prefix. Hattic formed conventional plurals with a "le-" prefix&colon; "children" = "le-pinu". Names with the prefix "Su-", which means "good", are very popular.