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Is there an easy way to identify missing ID numbers in a field?

Question asked by hunt4jc on Dec 14, 2017
Latest reply on Dec 15, 2017 by bixb0012

I have an ID number field and some of the numbers are missing. I know I can identify duplicate numbers in a number field, but can I identify missing numbers. There are almost 5000 numbers and to search for them manually is painful. Thanks.