Actually, I had the same problem once.

First I did sort by this column. Suppose your column is A. on one empty
column, for example E, in cell E2 put formula =If(A1=A2, 1, 0), and extend to
all of the column E. Then all of the duplicated records will be found. sum of
column E, you will know how many duplicates you've got.

Hope it can send you help!

Viesta
Shanghai, CN

"Bill in Wichita" wrote:

I have a spreadsheet with over 2000 rows of data I would like to quickly
isolate those with duplicate names or phone numbers. Can I do this in Filter?
I know I can eliminate duplicates but I want to find them.