Numbers with the 900 area code were those which were expected to have a huge number of potential callers, and the 900 area code was screened at the local level to allow only a certain number of the callers in each area to access the nationwide long distance network for reaching the destination number.
Adult chat lines (phone sex) and tech support are a very common use of premium-rate numbers.
Other services include directory enquiries, weather forecasts, competitions and voting (especially relating to television shows).
The number used for the radio program was one that was specially arranged by AT&T Corporation, CBS Radio, and the White House, to be free to the calling party.
the 900 area code was completely restructured by AT&T to be the premium-rate special area code which it remains today.
Other early leaders in amassing huge volumes of revenue were the New Kids on the Block and Dionne Warwick's Psychic Friends Network.
Consumers in the US have specific rights regarding 900 number calls, as laid down by the Federal Trade Commission, such as the right to a disclaimer at the beginning of the call and a subsequent 3-second hang-up grace period, the ability to contest billing errors, a prohibition on marketing to children, and a requirement that telecommunication companies must allow the consumer to block dialing to 900 numbers.Earlier, 976 numbers used 976 as a local prefix (970 or 540 in some markets like New York state), though it was not assigned to a specific telephone exchange like other prefixes.These numbers were dialed as any other number, such as 976-1234.Diplomatic services, such as the US Embassy in London or the UK Embassy in Washington, have also charged premium rates for calls from the general public.In many European countries, for example France, Germany and the United Kingdom, it was common for organisations to operate customer service lines on premium-rate numbers using prefixes that fall outside the scope of the country's premium-rate number regulations.While the billing is different, calls are usually routed the same way they are for a toll-free telephone number, being anywhere despite the area code used.