Use

=LEFT(A1,3)&"-"&MID(A1,4,2)&"-"&RIGHT(A1,3)

and copy down.

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__________________________________
HTH

Bob

"Pittman" wrote in message
...
In Excel 2007 I have a large spread sheet with 9 digit cell numbers and
text
that I need to insert dashes between. Is there a way that I can drag a
column
and insert the dashes all at one time.

Current Display: 123XY1234
Display Needed: 123-XY-1234
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Marcus