A couple of free services that offer free directory assistance for U.S. phone numbers include Free-411 and the service available through AT&T. Free-411 is advertiser supported, meaning that users have to listen to a 10-second advertisement before they can begin finding the phone number.
Callers in the United States can reach Free 411 directory assistance by dialing 1-800-Free-411 and listening to the prompts. AT&T also offers an advertiser-based directory assistance service for callers in the United States that requires callers to listen to a brief advertisement before they can obtain their number. AT&T’s free directory assistance telephone number is 1-800-935-5697.