PRESS RELEASE


March 4, 1999                                     Contact: Linda Grunberg
                                                  Director of Public Relations
                                                  Phone: 402-255-3748
                                                  Fax: 402-390-7188
                                                  Email:  lindag@dtn.com

                                                  Contact: Brian Larson
                                                  Vice President and CFO
                                                  Phone: 402-255-3757
                                                  Fax:  402-255-8227
 
DTN Amends Shareholder Rights Plan

         OMAHA, NEB - Data Transmission Network Corporation (DTN) (NASDAQ: DTLN)
announced today that its Board of Directors has amended the Companys Shareholder
Rights Plan to allow for the purchase of up to 15 percent of the Companys common
stock  before  the  rights  under  the plan  become  exercisable.  Prior to this
amendment, the rights generally became exercisable if a person or group acquired
11 percent  or more of DTNs  common  stock or  announced  a tender  offer for 11
percent or more of DTNs common  stock.  As amended,  the Plan allows a person or
group to acquire  greater  than 15% (but not more than 20%) of DTNs common stock
with a voting trust agreement with the Board of Directors.
         
         This  action  by DTNs  Board of  Directors  came  about as a result  of
conversations  with an investor  interested in acquiring greater than 11 percent
of the Company.  The  Shareholder  Rights Plan was implemented in August of 1997
and is designed to assure that all stockholders receive fair and equal treatment
in the event of any  proposed  takeover of the Company.  It also guards  against
partial tender offers,  open market  accumulations  and other abusive tactics to
gain  control  of  the  Company   which  might  provide   inadequate   value  to
stockholders.



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         Data  Transmission  Network  Corporation   (NASDAQ:   DTLN)  in  Omaha,
Nebraska, is an innovative  information and communication provider for a variety
of  industries  including  agriculture,  financial,  energy and  weather-related
industries.   Additional   industries  served  include  automotive,   electrical
equipment   and  freight   transportation.   DTN  is   committed   to  providing
comprehensive,  time  sensitive  and  affordably  priced  information  including
weather,  news,  quotes,  market  analysis and  commentary  to more than 159,000
subscribers in the U.S. and Canada via all relevant distribution technologies.
                       

  Visit the DTN Web site for company and investor information at www.dtn.com.
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