When the first phone lines were installed there were no phone numbers. The switch operator would just connect you to the person you wanted to speak to. When the telephone systems started expanding, the phone companies migrated to using telephone numbers. These first telephone switchboards started operating in 1894 and ever since then people became infatuated with their telephone numbers. But the time has come to realise that a telephone number is meaningless and no effort must be made to retain it or not change it.
Read the article on LinkedIn here.