In Australia, the prefix for premium rate phone services is 190x. 1900 was the initial prefix and is the most common.
However, when this prefix began to run out of available numbers the prefix 1901 and 1902 have also been allocated.
1901 is specifically reserved for services of a sexual nature. Previously (before the introduction of eight digit numbering), the prefix 0055 was used for this purpose, and as a result 190x numbers are occasionally referred to colloquially as 0055 numbers (pronounced double-oh, double-five).
Charges are set by the information provider. Calls are charged at a timed rate. Premium rates apply. Charges may vary from 35 cents to $5 or more per minute. Other charges may apply from mobile phones.
For more information visit the Australian Telecom Regulator at:
http://www.acma.gov.au/
