 The Tellme platform is based on open standards like VoiceXML, CCXML, and VoIP.The Tellme Voice Portal which includes directory assistance used to be accessed by calling (408) 752-8052.However, while (408) 752-8052 is no longer in service, Tellme may still be accessed by dialing (866) 895-3124 toll-free, or on the AT&T Wireless network by dialing #121 (note that this will use airtime minutes).