phonebook

A directory of all the phone numbers used in a district.

One even proposes, in a workaday monotone, that the first hundred people in any Idaho phonebook could do just as well as the legislators at making decisions in the capital.

A large lookup table.

He does this by using the Domain Name System, or DNS, which is the phonebook for the Internet.

To determine the identity of (an Internet user) by comparing personal information to real-world directories or databases (e.g., lists of people in phonebooks or relatives of those who have recently died).