The number to call for an international directory assistance service varies depending on where the request is based. In the U.S. and Canada, the number to dial for international directory assistance is 0; the caller can then dial 0 again to choose "operator assistance."
It is also possible to be re-directed to this service by calling the standard directory assistance on 411. In both cases the caller is billed for the service. As of 2014, it is possible to use a free international directory assistance service. AT&T provides a free service in the United States that can be accessed by dialing 800-225-5288. Similar services exist in Canada and can be accessed by dialling 800-555-1212.