Art wrote at 2013-12-04 22:23:20
There is a possible solution but it is unclear to me what precisely your data is. Will your data always be 10 digits with the first three digits displayed followed by four * then followed with the last three digits. If the answer is yes then decide which column you want to put your original information into. After this is done go to another column and insert this formula. In this example column A has the original data and Column B will contain the formula. =CONCATENATE((LEFT(A1,3)),"****",(RIGHT(A1,3)))
You will need to hide column A and protect the sheet, I assume you know how to do both.
If your number of digits are variable then where I have 3 in the formula you will have to change that to a cell value, I would need more information to explain to you how to create a cell value. Besides using the Right and Left Functions you may also need to use the Mid Function for the * and possibly the Len function if your number of digits are variable.
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