
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
ACE*COMM CORPORATION'S UNAUDITED FINANCIAL STATEMENTS AS OF AND FOR
THE SIX MONTHS ENDED DECEMBER 31, 1996 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               DEC-31-1996
<CASH>                                           7,060
<SECURITIES>                                         0
<RECEIVABLES>                                    9,382
<ALLOWANCES>                                        10
<INVENTORY>                                      2,074
<CURRENT-ASSETS>                                19,227
<PP&E>                                           2,946
<DEPRECIATION>                                   1,079
<TOTAL-ASSETS>                                  23,040
<CURRENT-LIABILITIES>                            3,496
<BONDS>                                            404
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            79
<OTHER-SE>                                      19,061
<TOTAL-LIABILITY-AND-EQUITY>                    23,040
<SALES>                                         13,521
<TOTAL-REVENUES>                                13,521
<CGS>                                            6,107
<TOTAL-COSTS>                                    6,107
<OTHER-EXPENSES>                                 6,022
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                (39)
<INCOME-PRETAX>                                  1,430
<INCOME-TAX>                                       266
<INCOME-CONTINUING>                              1,163
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,163
<EPS-PRIMARY>                                      .14
<EPS-DILUTED>                                        0
        

</TABLE>
