for international. The two domestic numbers have been replaced with 1223, while 0103 was replaced with 1225. Other numbers for directory assistance, often with a call connection option, exist depending on the carrier. 011 was initially the code for the operator, 0011 later became the international exit code. 014 was originally the number for the time, (later 1104), which was changed to 1194 in 1976. 0176 was originally the code for the operator when calling from a Public Telephone. It became the code for the reverse-charge call operator, which was moved to 12550. Alternatively 3rd-party companies exist. See Collect call#Australia 1960s Up to this time, the maximum size of an Australian telephone number was six digits. Until the early 1960s, the first one or two digits of telephone numbers in metropolitan areas were alphabetic, with each letter representing a distinct number on the telephone dial. Each one-letter or two-letter code signified an exchange within an urban area. Rural and regional areas typically relied on manual exchanges, or only one automatic exchange for the whole town, so rural and regional numbers did not feature these letter prefixes. The use of a letter-number combination also served as a memory aid as it was easier to remember than a string of digits in the days when such things were not as common. Unlike the three (or fewer) letters associated with each of the numbers on the dials of telephones of the UK Director telephone system, which was used in London and other large British cities, Australia used a system of letters associated with the ten digits available on a telephone dial, where each of these letters were chosen because their "name" (when pronounced, in English) could not be confused with any of the other nine letters of the English/Latin alphabet which were also used. Since the initial digits of 1 and 0 (ten) were not used, this gave the telephone company concerned up to 8 regions with main exchanges and up to ten sub-exchanges in each metropolitan area – a total of up to 80 individual exchanges of 10,000 numbers in each with up to only 800,000 individual "numbers" in any metropolitan area concerned. This limited capacity led to the need for a seven- or eight-digit numbering system, to allow for more "numbers" within a given area. Because of the growth of the telephone network, Australia now has eight-digit telephone numbers within four