<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF WORLDCOM, INC. AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.


<MULTIPLIER>       1,000,000

                                                                       
<PERIOD-TYPE>                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1999             DEC-31-1999
<PERIOD-START>                             JAN-01-1999             JAN-01-1999             JAN-01-1999
<PERIOD-END>                               JUN-30-1999             SEP-30-1999             DEC-31-1999
<CASH>                                             617                     318                     876
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                    6,800                   6,428                   6,868
<ALLOWANCES>                                       977                   1,128                   1,122
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                                10,188                   9,784                  10,324
<PP&E>                                          28,222                  30,449                  33,738
<DEPRECIATION>                                 (3,412)                 (4,304)                 (5,110)
<TOTAL-ASSETS>                                  87,199                  87,568                  91,072
<CURRENT-LIABILITIES>                           16,964                  15,682                  17,226
<BONDS>                                         13,877                  13,561                  13,128
<PREFERRED-MANDATORY>                              798                     798                     798
<PREFERRED>                                          0                       0                       0
<COMMON>                                            28                      28                      28
<OTHER-SE>                                      48,357                  49,413                  51,210
<TOTAL-LIABILITY-AND-EQUITY>                    87,199                  87,568                  91,072
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                17,590                  26,586                  35,908
<CGS>                                            7,496                  11,089                  14,739
<TOTAL-COSTS>                                   14,298                  21,095                  28,020
<OTHER-EXPENSES>                                  (22)                    (53)                   (242)
<LOSS-PROVISION>                                   458                     674                     951
<INTEREST-EXPENSE>                                 520                     748                     966
<INCOME-PRETAX>                                  2,794                   4,796                   7,164
<INCOME-TAX>                                     1,201                   1,994                   2,965
<INCOME-CONTINUING>                              1,613                   2,710                   4,013
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     1,577                   2,656                   3,941
<EPS-BASIC>                                       0.56                    0.94                    1.40
<EPS-DILUTED>                                     0.54                    0.91                    1.35