The oldest known telephone directory was issued in February 1878 and consisted of a single piece of cardboard. It listed 50 individuals or businesses in New Haven, Connecticut that had telephones but not their numbers. – WTF Fun Facts
WTF Fun Fact – Oldest Telephone Directory
perfect and high brand
@Andrew, it listed the names of people who had telephones, but not their telephone numbers.
What do you mean by “had their telephones but not their numbers”?