NEW YORK, May 11 /PRNewswire-FirstCall/ -- deltathree, Inc. , a leading provider of VoIP hosted communications solutions for service providers and consumers worldwide, announced today that Mr. Paul White, deltathree Chief Financial Officer, will be presenting at the CIBC World Markets Annual Communications & Technology Conference to be held in New York. deltathree will be presenting at the conference on Wednesday, May 11, 2005 at 2:20 p.m. Eastern Time.

A Webcast of the event will be broadcast over the Internet providing live audio of the deltathree investor presentation. To access the audio Webcast presentation via the Internet on Wednesday, May 11, 2005 at 2:20 p.m. Eastern Time, individuals can visit online at http://www.veracast.com/webcasts/cibcwm/tech05/11208245.cfm. Participants are encouraged to visit the Web site at least 15 minutes prior to the presentation start time to download and install any necessary software. The presentation will also be available for replay for 30 days after the event on the investor relations page of the deltathree corporate Web site at http://www.deltathree.com/.

About deltathree

Founded in 1996, deltathree is a leading provider of hosted, Session Initiation Protocol (SIP)-based Voice over Internet Protocol (VoIP) products and services. deltathree provides private-label products, including Broadband Phone and PC to Phone, as well as back-office services such as billing, operations management, marketing support, and network management, to service providers worldwide. deltathree's consumer division, iConnectHere, provides award-winning VoIP products directly to consumers. deltathree's high quality Internet telephony solutions are viable and cost-effective alternatives to traditional telephone services.

For more information about deltathree, visit our web site at http://www.deltathree.com/.

For more information about iConnectHere, visit our web site at http://www.iconnecthere.com/.

CONTACT: Investor: Erik Knettel, +1-646-284-9415, eknettel@hfgcg.com,
Media: Allan Jordan, +1-646-284-9452, ajordan@hfgcg.com, both for deltathree,
Inc.

Web site: http://www.deltathree.com/
http://www.iconnecthere.com/
http://www.veracast.com/webcasts/cibcwm/tech05/11208245.cfm