From Longman Dictionary of Contemporary Englishdirectory enquiriesdiˌrectory enˈquiries British English, directory assistance American English noun [uncountable] TCTa service on the telephone network that you can use to find out someone’s telephone number
Examples from the Corpus
directory enquiries• Perhaps she should get his number from directory enquiries.• Pascoe had obtained the number from directory enquiries and listened to her answerphone message a dozen times or more.• First he rang directory enquiries and then the operator.• She hunted down the telephone number through directory enquiries and then rang.• Only when she checked with directory enquiries did she learn that the receiver was off the hook.From Longman Business Dictionarydirectory enquiriesdiˌrectory enˈquiries British English, directory assistance American English noun [uncountable] the telephone service that provides telephone numbers to people who ask for themSYNinformation AmE 