| Company Description 
 Arbinet has created the only Internet-based business-to-business, or B2B,
 trading exchange through which telecommunications service providers can buy,
 sell and deliver to each other network capacity, expressed in minutes of
 available calling time, for international and domestic long distance voice and
 fax calls. Our exchange is neutral, favoring neither buyers nor sellers, and
 allows participants to trade anonymously. Physical delivery of traded capacity
 is made automatically through our multi-port switch using software that we
 developed and a process that we patented. We handle all invoicing, collection
 and payment for trades effected on our exchange, evaluate and assume the risk of
 the creditworthiness of each buyer and provide continuous monitoring and on-line
 rating of the service quality of each seller's network. By trading capacity on
 our on-line exchange, telecommunications service providers can enhance the
 utilization of their networks, increase their revenues and reduce their
 operating and administrative costs.
 
 THE GLOBAL TELECOMMUNICATIONS INDUSTRY
 
 The $877 billion global telecommunications services industry is
 characterized by rapid growth, fragmentation, operating inefficiencies, high
 fixed costs, and declining prices and margins. This has resulted from, among
 other things, global deregulation, the development and deployment of new
 technologies and declining technology costs. The construction of new
 high-capacity telecommunications networks has led to dramatic growth in the
 industry's ability to carry telecommunications traffic. Most of this capacity
 remains unused, except in peak periods. As a result, carriers are under pressure
 to sell their excess capacity, since available minutes of calling time expire
 worthless unless used. Current industry practices for trading network capacity
 typically involve a one-to-one contract process that takes place in the absence
 of information regarding prevailing market prices and without competitive
 bidding. Most telecommunications service providers employ large staffs and
 expend significant resources to find a buyer or seller on a desired route at
 acceptable price and quality levels. They must then negotiate a contract for the
 sale or purchase of network capacity, evaluate the creditworthiness or network
 quality of their counterparty, set up a physical interconnection with that
 party, and establish and implement procedures for invoicing and payment. This
 one-to-one process is expensive, can take from three to six months for each
 transaction, binds each party to a contract that may well become obsolete as
 market conditions change, and burdens them with numerous interconnections that
 must be maintained and managed.
 
 ARBINET--THEXCHANGE
 
 In stark contrast to traditional industry practices, once interconnected to
 our exchange, telecommunications service providers can efficiently trade network
 capacity with other users of our exchange. Our on-line exchange automatically
 matches a buyer's posted bid for network capacity on a specified route with the
 lowest priced offer of capacity on that route posted by a seller that can meet
 the buyer's specified price and quality criteria. All bids, offers and trades
 are anonymous, although bid and offer prices are available to all exchange users
 to facilitate market transparency. With a single interconnection to our central
 communications switch, a user of our exchange can send call traffic to or
 receive traffic from the networks of all other exchange users without further
 interconnections. All trades become effective, and a buyer's obligation for
 payment arises, upon physical delivery of calls, which are routed automatically
 from the seller's network to the buyer's network when they are made. We evaluate
 the creditworthiness of each buyer that seeks to trade on our exchange and
 assume responsibility for collections from those buyers and remittances to
 sellers. We currently generate
 
 revenues from minutes traded on our exchange and exchange fees. We commenced
 trading on our exchange in October 1999. From October 1999 through
 February 2000, 17.2 million minutes were traded on our exchange.
 
 Our exchange serves the growing market for international and domestic long
 distance voice and fax calls. In 1998, calls in the international market
 aggregated 93 billion minutes, generating $69 billion in total revenues. The
 number of minutes in this market is expected to grow at a rate of approximately
 12% annually, and total revenue is expected to grow at a rate of approximately
 1.5% annually. We estimate that the service providers in this market include
 over 1,000 international long distance carriers, over 500 competitive local
 exchange carriers and over 250 voice over Internet protocol service providers
 worldwide.
 
 BENEFITS OF ARBINET--THEXCHANGE
 
 The benefits of our exchange to buyers include:
 
 - lower operating costs;
 - access to multiple sellers;
 - automatic least-cost traffic routing;
 - availability of network quality ratings; and
 - convenience and confidentiality.
 
 The benefits of our exchange to sellers include:
 
 - lower operating costs;
 - access to multiple buyers;
 - anonymity;
 - increased revenues;
 - reduced financial exposure; and
 - convenience and confidentiality.
 
 OUR STRATEGY
 
 We intend to be the primary centralized market for the purchase, sale and
 delivery of telecommunications capacity. Key elements of our strategy include:
 
 - increasing participation on our exchange;
 - expanding our geographic presence;
 - expanding the services offered through our exchange; and
 - enhancing our technology offerings.
 
 RECENT DEVELOPMENTS
 
 On March 7, 2000, we completed the private placement of 2,120,228 shares of
 our Series D preferred stock for a total purchase price of approximately
 $41.0 million. Purchasers of the Series D preferred stock included investors
 affiliated with Van Wagoner Capital Management, Breakaway Capital, Amerindo
 Investment Advisors, Inc., Communications Ventures III, L.P., Bedrock Capital
 Partners I, L.P., Internet Capital Group, Inc., J.P. Morgan Investment
 Corporation, Chase Capital Partners and BancBoston Ventures Inc.
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