Directory enquiries is a collective term for several telephone number lookup services in the United Kingdom that are similar to the directory assistance service in the United States. There are approximately 400 companies that provide this service as of December 2015.
Callers to directory enquiries must dial 118 and a three digit number that is specific to the service provider. Most services allow customers to request two or three listings per call. Many service providers rely on automated voice systems to provide callers with the requested numbers, but a few offer live operators. Charges for calls to directory enquiries vary among providers, with some companies charging a flat fee per call and others charging an initial connection fee plus a fixed rate per minute or portion thereof. Many of the lower-cost companies require callers to listen to ads before providing them with the requested number.