The invention comprises a graphic designation method for visually differentiating each number individually for a set of telephone numbers within a printed telephone directory. In a particular instance, the invention is applied in cases in which each said telephone number in the set has been established as a link element for linking to online digital resources associated with said telephone number. The invention also teaches a method for establishing a printed telephone number directory simultaneously as a directory for a telephone number directory service. The invention also teaches a method for displaying instructions for Internet addressing within a printed directory.