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                                                                                                 Exhibit 12.1
                                       WORLDCOM, INC. AND SUBSIDIARIES
                             Computation of Ratio of Earnings  to Combined Fixed
                                    Charges and Preferred Stock Dividends
                                          (In Thousands of Dollars)

                                                                                        For the Three Months
                                                   Year Ended December 31,                 Ended March 31,  
                                      ------------------------------------------------  --------------------
                                       1991      1992      1993       1994      1995       1995       1996  
                                     --------  --------  --------  ---------  --------  ---------  ---------
                                                                              

Earnings:
  Pretax income (loss) from 
    continuing operations            $ 65,646  $ 20,401  $198,237  $(76,108)  $405,596   $ 81,525   $139,658

  Fixed charges, net of capitalized
    interest                           38,116    38,720    58,999    87,455    300,094     73,425     62,698
                                     --------  --------  --------  ---------  --------  ---------  ---------
  Earnings                           $103,762  $ 59,121  $257,236  $ 11,347   $705,690   $154,950   $202,356
                                     ========  ========  ========  =========  ========  =========  =========

Fixed charges:
  Interest cost                      $ 34,495  $ 33,815  $ 38,657  $ 49,203   $253,945   $ 62,308   $ 59,304
  Amortization of financing costs       1,018     1,464     1,792     2,086      2,811        710        713
  Interest factor of rent expense       5,503     4,833     9,967    10,300     15,030      3,468      4,454
  Preferred dividend requirements          --     2,112    11,683    27,766     33,191      6,939        505
                                     --------  --------  --------  ---------  --------  ---------  ---------
  Fixed charges                      $ 41,016  $ 42,224  $ 62,099  $ 89,355   $304,977   $ 73,425   $ 64,976
                                     ========  ========  ========  =========  ========  =========  =========

Deficiency of earnings to fixed 
  charges                            $     --  $     --  $     --  $(78,008)  $     --  $      --   $     --
                                     ========  ========  ========  =========  ========  =========  =========

Ratio of earnings to combined fixed
  charges and preferred stock 
  dividends                            2.53:1    1.40:1    4.14:1    0.13:1     2.31:1     2.11:1     3.11:1
                                     ========  ========  ========  =========  ========  =========  =========

<FN>

See notes to computation of ratio of earnings to combined fixed charges and preferred stock dividends.



                  Notes to Computation of Ratio of Earnings to
              Combined Fixed Charges and Preferred Stock Dividends

(1) On January 5, 1995, the Company completed the acquisition of Williams
    Telecommunications Group, Inc. for approximately $2.5 billion in cash which
    was accounted for as a purchase.

(2) As a result of the mergers with IDB Communications Group, Inc. (the "IDB
    Merger") and Advanced Telecommunications Corporation (the "ATC Merger"), 
    the Company initiated plans to reorganize and restructure its management

 2

    and operational organization and facilities to eliminate duplicate 
    personnel, physical facilities and service capacity, to abandon certain
    products and marketing activities, and to further take advantage of the 
    synergy available to the combined entities.  Also, during the fourth 
    quarter of 1993, plans were approved to reduce IDB Communications Group, 
    Inc.'s cost structure and to improve productivity.  Accordingly, in 1994, 
    1993 and 1992, the Company charged to operations the estimated costs of 
    such reorganization and restructuring activities, including employee 
    severance, physical facility abandonment and duplicate service capacity.  
    These costs totaled $43.7 million in 1994, $5.9 million in 1993 and $79.8 
    million in 1992.

    Also, during 1994 and 1992, the Company incurred direct merger costs of 
    $15.0 million and $7.3 million, respectively, related to the IDB Merger (in
    1994) and the ATC Merger (in 1992).  These costs include professional fees,
    proxy solicitation costs, travel and related expenses and certain other 
    direct costs attributable to these mergers.

(3) In connection with certain debt refinancing, the Company recognized in 1993
    and 1992 extraordinary items of approximately $7.9 million and $5.8 
    million, respectively, net of income taxes, consisting of unamortized debt 
    discount, unamortized issuance cost and prepayment fees.

(4) In the third quarter of 1995, Metromedia Company ("Metromedia") converted 
    its Series 1 Preferred Stock into 21,876,976 shares of WorldCom common 
    stock and exercised warrants to acquire 3,106,976 shares of WorldCom common
    stock and immediately sold its position of 30,849,548 shares of WorldCom 
    common stock in a public offering.  In connection with the preferred stock 
    conversion, WorldCom made a one-time non-recurring payment of $15.0 
    million to Metromedia, representing a discount to the minimum nominal 
    dividends that would have been payable on the Series 1 Preferred Stock 
    prior to the September 15, 1996 optional call date of approximately $26.6 
    million (which amount includes an annual dividend requirement of $24.5 
    million plus accrued dividends to such call date).