On: Look Up Unknown Phone Numbers Using Facebook Reset...

[aembleton]

Could I easily look up a name for a given phone number with this book?

Or did I have to go through the whole book to find a match?

[kristopolous → aembleton]

Of course. It was called the greypages. https://en.wikipedia.org/wiki/Reverse_telephone_directory

In old movies you sometimes see people ask the operator to do a reverse search as well so I assume it wasn't a big deal.