1471
/ˌwʌn fɔː sevn ˈwʌn/
/ˌwʌn fɔːr sevn ˈwʌn/
- (in Britain) the phone number you can use to find out the phone number of the person who called you most recently, and the time the call was made
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1471
Definition of 1471 from the Oxford Advanced Learner's Dictionary