ex-directory

剑桥词典

used to refer to a phone number that is not made public by the phone company
（电话号码）不在电话簿上的
We've gone ex-directory because we were receiving so many unwanted calls . 我们已经把我们的号码从电话号码簿中取消了，因为老是接到打错的电话。 返回 ex-directory