International modem dialling

Customers of dial-up Internet Service Providers, such as AOL, use a modem to dial a local connection number. Some web sites, normally containing adult content, use international dialing to trick consumers into paying to view content on their web site. Often these sites purport to be free and advertise that no credit card is needed. They then prompt the user to download a "viewer" or "dialer" to allow them to view the content. Once the program is downloaded it disconnects the computer from the Internet and proceeds to dial an international long distance or premium rate number, charging anything up to US$7-8 per minute. An international block is recommended to prevent this, but in the U.S. and Canada, calls to the Caribbean (except Haiti) can be dialed with a "1" and a three-digit area code, so such numbers, as well as "10-10 dial-round" phone company prefixes, can circumvent an international block.