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Press Release dated May 26, 2003

Sprint Canada renews telecommunications contract with over 1,000 health and
social service organizations in Québec

en Français (MONTRÉAL, Québec), May 26, 2003  Sprint Canada Inc., a national
provider of residential and business telecommunications services and a
wholly-owned subsidiary of Call-Net Enterprises Inc., (TSX: FON, FON.B) today
announced that it has renewed a two-year contract with Approvisionnements 
Montréal santé et services sociaux, to provide long distance, toll free
service, and calling cards to 1,000 health and social service organizations in
Québec. The value of the two-year contract is estimated to be $2.6 million.

Approvisionnements  Montréal santé et services sociaux was established to
acquire goods and services for all health and social service organizations in
the Greater Montréal and Laval regions. The corporation also purchases goods
and services on behalf of other health and social service organizations when
greater economies of scale can be achieved, as is the case with
telecommunication services.

Sprint Canada began providing long distance, toll free and calling card
services to Québecs health and social service organizations through
Approvisionnements  Montréal santé et services sociaux, in 1994. In 2000,
Sprint Canada was again awarded a contract to provide service through a public
tendering process. Utilizing Sprint Canadas high-speed network, Québecs
health and social service organizations have increased productivity and been
able to control costs when making long distance, fax, modem and FONCARDTM calls
across the province, country and around the world.

Sprint Canadas technology and a reliable network are givens. What continues
to set the company apart is the high level of customer service it provides in
order to support the individual needs of over 1,000 agencies within our
membership, said Yves Godin, operations manager, Approvisionnements  Montréal
santé et services sociaux. We renewed the two-year contract with Sprint Canada
because we have found that their service team brings a keen understanding of
both the financial challenges facing the public sector today and the imperative
to provide reliable technology and excellent customer support.

We are delighted that Approvisionnements  Montréal santé et services sociaux
has once again selected Sprint Canada as their telecommunications provider,
said Philippe Sicotte, vice-president, Québec and federal regions, Sprint
Canada. Helping organizations optimize and cost-effectively manage their
telecommunications needs, sets our company apart from our competitors. Our
solutions focused sales and service model allow us to provide comprehensive
solutions oriented voice, data and network solutions to organizations of all
sizes.

The long distance, toll free and calling card services will be supported by a
custom billing and reporting system that will allow the user organizations to
customize their reports, manage their telecommunications costs and maintain
their systems in an efficient manner. The customized billing and reporting
system is similar to Sprint Canadas industry leading Bill Analysis Software.

Approvisionnements  Montréal santé et services sociaux joins a growing list of
Canadas leading organizations that have recently selected Sprint Canada as
their telecommunications provider.

Approvisionnements  Montréal santé et services sociaux

Approvisionnements  Montréal is a non-profit organization constituted in
compliance with the Health and Social Services Law. The organization
encourages, develops and manages overall provisioning for the establishments
located in the Montréal Centre and Laval regions. In these regions,
Approvisionnements  Montréal serves over 140 health and social services
establishments that purchase more than $500 million in goods and services
annually.

About Sprint Canada Inc.

Sprint Canada is a wholly owned subsidiary of Call-Net Enterprises Inc. a
leading Canadian integrated communications solutions provider of local and long
distance voice services as well as data, networking solutions and online
services to businesses and consumers. Sprint Canada Inc. and Call-Net
Enterprises are headquartered in Toronto, owns and operate an extensive
national fibre network and have over 134 co-locations in nine Canadian
metropolitan markets. For more information, visit the Companys web sites at
www.sprint.ca and www.callnet.ca.





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Note for Investors:

This news release may include statements about expected future events and/or
financial results that are forward-looking in nature and subject to risks and
uncertainties. For those statements, we claim the protection of the safe
harbour for forward-looking statements provisions contained in the Private
Securities Litigation Reform Act of 1995. The company cautions that actual
performance will be affected by a number of factors, many of which are beyond
its control. Future events and results may vary substantially from what the
company currently foresees. Discussion of the various factors that may affect
future results is contained in the companys recent filings with the Securities
and Exchange Commission, the Ontario Securities Commission and SEDAR.

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|For further information                                                                        |  |                                                                                                          
|Media contact:
Karen OLeary
Corporate Communications
(416) 718-6445
koleary.sprint-canada.com |  | Investor Relations contact:
Farzana Giga
Investor Relations
(416) 718-6251
farzana.giga@sprint-canada.com