<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
This financial data schedule contains summary financial information extracted
from the unaudited, consolidated balance sheet of ITC/\DeltaCom,Inc. as of
September 30, 2000. This information, in thousands, is qualified in its entirety
by reference to such financial statements.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 178,538
<SECURITIES> 0
<RECEIVABLES> 131,768
<ALLOWANCES> 3,291
<INVENTORY> 8,524
<CURRENT-ASSETS> 319,514
<PP&E> 766,109
<DEPRECIATION> 159,496
<TOTAL-ASSETS> 1,056,159
<CURRENT-LIABILITIES> 165,241
<BONDS> 514,881
0
15
<COMMON> 615
<OTHER-SE> 206,031
<TOTAL-LIABILITY-AND-EQUITY> 1,056,159
<SALES> 264,993
<TOTAL-REVENUES> 264,993
<CGS> 111,890
<TOTAL-COSTS> 279,118
<OTHER-EXPENSES> 181
<LOSS-PROVISION> 2,276
<INTEREST-EXPENSE> 41,339
<INCOME-PRETAX> (43,615)
<INCOME-TAX> 0
<INCOME-CONTINUING> (43,615)
<DISCONTINUED> 0
<EXTRAORDINARY> (1,321)
<CHANGES> 0
<NET-INCOME> (44,936)
<EPS-BASIC> (.74)
<EPS-DILUTED> (.74)
</TABLE>