That case ruled the phone book in question was not copyright protected:

> The court held that Rural's directory was nothing more than an alphabetic list of all subscribers to its service, which it was required to compile under law, and that no creative expression was involved. That Rural spent considerable time and money collecting the data was irrelevant to copyright law, and Rural's copyright claim was dismissed.

In theory a curated phone book could be copyrighted, e.g. a hypothetical "Best Restaurants in San Francisco" compilation could be copyrighted. However a general phonebook just listing business in alphabetical order does not meet the originality threshold that was laid out in Feist v. Rural.