<ARTICLE> 5 <LEGEND> This Schedule contains summary financial information extracted from MCI WORLDCOM, Inc.'s financial statements for the six months ended June 30, 1999, and is qualified in its entirety by reference to such financial statements. </LEGEND> <MULTIPLIER> 1,000,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 599 <SECURITIES> 0 <RECEIVABLES> 6,713 <ALLOWANCES> 952 <INVENTORY> 0 <CURRENT-ASSETS> 10,096 <PP&E> 27,744 <DEPRECIATION> (3,180) <TOTAL-ASSETS> 86,573 <CURRENT-LIABILITIES> 16,839 <BONDS> 13,550 <PREFERRED-MANDATORY> 798 <PREFERRED> 0 <COMMON> 19 <OTHER-SE> 48,230 <TOTAL-LIABILITY-AND-EQUITY> 86,573 <SALES> 0 <TOTAL-REVENUES> 17,945 <CGS> 0 <TOTAL-COSTS> 14,686 <OTHER-EXPENSES> (16) <LOSS-PROVISION> 447 <INTEREST-EXPENSE> 496 <INCOME-PRETAX> 2,779 <INCOME-TAX> 1,195 <INCOME-CONTINUING> 1,584 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,572 <EPS-BASIC> 0.85 <EPS-DILUTED> 0.81