Not sure if the UBB discombobulated your code, so I will give you an example within [CODE] tags

code:
if substr(@ipaddress0,1,8)=" 10. 65."
  ;do something
endif
Rather than multiple IF - ENDIF statements, since only one can be true, better to do a SELECT CASE.

Have you had a look at the UDFs I mentioned? Search the UDF section for the words "is in subnet" if you haven't.

I assume you are using KiX 4.
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