InfoSpace.com directories have an unduplicated reach of 83 percent of US Internet users and were rated No. 1 most viewed site by Media Metrix in Jan., Feb. and March

Hackensack, NJ. and REDMOND, Wash. -April 6, 1999- IDT's (NASDAQ: IDTC) Net2Phone, the market leader in IP telephony services, and InfoSpace.com, (NASDAQ: INSP), a leading provider of private label solutions for content and commerce today, announced an agreement to enable one-click dialing by integrating Net2Phone's PC-to-phone technology in InfoSpace.com's white and yellow page directories. This integration will enable Internet users with Net2Phone technology to make phone calls over the Internet simply by clicking on a phone number they've found in InfoSpace.com's directories and save up to 95 percent on traditional long distance calls. These calls are routed over the Internet from the consumer's PC, offering full-duplex real-time conversation. Recipients of these calls simply answer their telephones as they would an ordinary telephone call.

InfoSpace.com's directories are available through its broad network of affiliates including America Online, The Microsoft Network and Netscape and have an unduplicated reach of 83 percent of US Internet users and were rated No. 1 by Media Metrix in Jan., Feb. and March.

"We are very excited to enable one-click dialing from InfoSpace.com's directory services, which are one of the most extensive on the web and also have tremendous reach due to InfoSpace.com's valuable partnerships," said Mordy Rothberg, executive vice president of Net2Phone. "We expect to enhance the functionality of InfoSpace.com's directories by allowing users to place their calls without getting offline - and users can also benefit from the savings on their long distance bills."

"We are committed to providing Internet users the tools to find and use real world information wherever they are," said Naveen Jain, chairman and CEO, InfoSpace.com. "This partnership allows us to add one-click dialing to our directories making them even more convenient and easy-to-use and more attractive to large destination sites and portals looking for private label content solutions."

About IDT

IDT is a leading emerging multinational carrier that combines its position as an international telecommunications operator, its experience as an Internet service provider and its leading position in Internet telephony to provide a broad range of telecommunications services to its wholesale and retail customers worldwide. The company provides its customers with integrated and competitively priced international and domestic long distance, pre-paid calling cards, Internet access and, through its Net2Phone product offerings, Internet telephony services including Net2Phone Direct, Net2Fax, and Click2Talk. For more information about IDT's Internet telephony services, please visit www.net2phone.com.

About InfoSpace.com

InfoSpace.com is a leading provider of private label solutions for content and commerce to Web sites and Internet appliances. InfoSpace.com's affiliate network consists of more than 1,500 Web sites. The Company's affiliates include AOL, Netscape, Microsoft, Lycos, go2net Inc.'s MetaCrawler, Dow Jones (The Wall Street Journal Interactive Edition), ABC LocalNet and CBS's affiliated TV stations. In addition, InfoSpace.com has agreements with a number of providers of Internet access devices including PCs by Acer America and The Pixel Company (for Packard Bell NEC), cellular phones by AT&T Wireless and UnWired Planet, pagers by WolfeTech (for Motorola), screen phones by InfoGear, Mitel, Mitsui and Lucent, television set-top boxes by American Interactive Media, @Home, Lucent, On Command, Planetweb and Source Media, online kiosks by King kiosk platform and Lexitech kiosk platform, and personal digital assistants by AT&T Wireless, InfoGear and Unwired Planet.

Except for historical information, all of the expectations and assumptions contained in the foregoing are forward-looking statements involving risks and uncertainties. Important factors that could cause actual results to differ materially from such forward-looking statements, include, but are not limited to, the competitive environment for Internet telephony, changes of rates of all related telco rates and services, legislation that may affect the Internet telephony industry, IDT's ability to operate the services described on a large scale commercial level. For additional information regarding these and other risks associated with the company's business refer to the company's reports filed with the SEC.

Sarah Hofstetter
Vice President, Corporate Communications
IDT Corporation
201-928-2882