Hello Nigel

Thank you very much for your help, you guys are Excel Masters !!!

This is what I did:

39703.52331 115112324742 Peru-Lima 0.021527778 DUP
39703.54525 115112324742 Peru-Lima 0.000694444
39703.865 115112324742 Peru-Lima 0.001388889
39704.46297 115112324742 Peru-Lima 0.007638889
39704.79645 115112324742 Peru-Lima 0.006944444
39704.84566 115112324742 Peru-Lima 0.000694444
39704.8647 115112324742 Peru-Lima 0.004861111
39705.47488 115112324742 Peru-Lima 0.011805556 DUP
39705.48708 115112324742 Peru-Lima 0.003472222
39706.49169 115112324742 Peru-Lima 0.001909722 DUP
39706.49395 115112324742 Peru-Lima 0.000694444 DUP
39706.49535 115112324742 Peru-Lima 0.007638889

I converted both Call Date/Time and Duration columns into Values and after
sorting columns as you recomended I used following formula:

=IF(AND(B2=B3,A3-(A2+D2)<=0.001888),"DUP","")
and it worked perfectly!

Thanks & regards
farid2001

"Nigel" wrote:

Put a helper column to the right of your data and place the following
formula in the top data row and copy down to the last row.
(assumes date-time in column A and #phone in column B and that data is
sorted in #phone number then date-time descending order)

=IF(AND(B2=B3,A2-A3<=TIME(0,2,0)),"Dupe","NoDupe")

at top of column use something like (change column and range of data to
suit)

=COUNTIF(C2:C10,"Dupe")

To count the dupes

--

Regards,
Nigel




"farid2001" wrote in message
...
Hello
I would really appreciate some help here.
I want to count duplicate numbers based on a time spam.
This is what I have:

Call Date/Time Number Dialed Location Duration
09/09 22:37:36 17204355125 Denver, CO 813
09/09 22:25:24 17204355125 Denver, CO 111
09/09 22:09:09 17204355125 Denver, CO 951
09/09 22:07:08 17725710557 Sebastian, FL 57
09/09 21:03:20 13018467933 Frederick, MD 57
09/09 20:41:52 17725711815 Sebastian, FL 532
09/09 20:36:21 17725710557 Sebastian, FL 9
09/09 20:35:31 17725710557 Sebastian, FL 29
09/09 20:34:33 17725710418 Sebastian, FL 1

For example in this situation we have that 17725710557 and 17204355125
were
dialed 3 times each, but what I need is only to count as duplicate when
the
same number is dialed 120 seconds or less from the time the previous call
to
that number was over.

I know is a real tough situation, can it be done?

Regards
farid2001