For directory assistance in the (610), (484), (215), and (267) area
codes:
dial 9 + area code + 555-1212 (+ auth code for students)
For directory assistance for other area codes in the United States
and Canada:
dial 9 + 1 + area code + 555-1212 (+ auth code) Note that
a charge of $0.75 applies to each call to directory assistance.
There are many potentially useful sources of telephone directory
information available via the Internet. AT&T offer a searchable
toll-free (800/888) yellow
pages site and Switchboard offers National
white/yellow pages databases.
