Although it has its limitations, Validation is one way:

1. Select the range.
2. Go to Data Validation.
3. Under "Allow" select "Whole Number".
4. Fill in the "Min" with 0 and "Max" with 99999.

HTH
Jason
Atlanta, GA

-----Original Message-----
is there a way to prevent a duplicate entry for a range
of numbers between
00001 and 99999 in column?

Thanks ... TK
.