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. A call to either one of these numbers can result in a high per-minute or per-call charge. For example, a "psychic hotline" type of 1-900 number may charge $2.99 for the first minute and 99 cents for each additional minute. Initially, consumers had no choice regarding the accessibility to 900/976 numbers on their phones. However, in 1987, after a child had accumulated a bill of $17,000, the California Public Utilities Commission subsequently required phone companies to give customers the option of preventing the dialing of 900/976 numbers. From the early 1980s through the early 1990s, it was common to see commercials promoting 1 (900) numbers to children featuring such things as characters famous from Saturday morning cartoons to Santa Claus. Due to complaints from parent groups about kids not knowing the dangers and high cost of such calls, the FTC enacted new rules and such commercials directed at children ceased to air on television as of the mid-1990s. Using 900 numbers for adult entertainment lines was a prevalent practice in the early years of the industry. This practice continues, along with the use of these numbers for things such as software technical support, banking access, and stock tips. Adult entertainment 900 numbers have been largely absent from AT&T and MCI since 1991. In 1992, the Supreme Court allowed a law passed by Congress that created a block on all 900 numbers that provided adult content, except for those consumers who requested access to a specific number in writing. The law killed the adult 900 number business, which moved over to 800 numbers, where billing had to be done by credit card. Hulk Hogan's Hotline was a lucrative 900 number in the 1990s. 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