<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED
FROM THE FINANCIAL STATEMENTS OF ITXC CORP AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CURRENCY> 1
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<EXCHANGE-RATE> 1
<CASH> 87,893,850
<SECURITIES> 123,301,086
<RECEIVABLES> 13,597,309
<ALLOWANCES> 3,021,565
<INVENTORY> 0
<CURRENT-ASSETS> 224,173,898
<PP&E> 31,393,548
<DEPRECIATION> 6,620,232
<TOTAL-ASSETS> 259,411,004
<CURRENT-LIABILITIES> 14,512,230
<BONDS> 1,723,191
0
0
<COMMON> 38,532
<OTHER-SE> 289,334,877
<TOTAL-LIABILITY-AND-EQUITY> 259,411,004
<SALES> 33,685,300
<TOTAL-REVENUES> 33,685,300
<CGS> 0
<TOTAL-COSTS> 32,619,270
<OTHER-EXPENSES> 18,939,642
<LOSS-PROVISION> 1,437,854
<INTEREST-EXPENSE> 326,240
<INCOME-PRETAX> (21,474,409)
<INCOME-TAX> 0
<INCOME-CONTINUING> (21,474,409)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (21,474,409)
<EPS-BASIC> (0.57)
<EPS-DILUTED> (0.57)
</TABLE>