Without an understanding on what boundaries you subnet, I can't really advise further. I subnet on class 'B' and 'C' boundaries so figuring out what submnet a machine is in is a cake walk.
Take a look at this UDF
Topic: CalcLogicalSubnet () - Returns the logical subnet ID
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.
