Active directory missing subnets

Thomas_1991
Thomas_1991 used Ask the Experts™
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At a costumer AD i have many missing subnets. maybe a few hundred.

is there an eventlog or something else where i can get the subnet informations of clients which are not in a subnet which is known from the AD?

i wanted to write a script and get this information from netlogon.log, but as there is just the IP address it´s not really helpfull.

Best regards
Thomas
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Can be found in netlogon logs

https://gallery.technet.microsoft.com/scriptcenter/Get-a-report-on-missing-f2a95194

to check is the given IP is added on the AD and in which subnet

http://www.windowstricks.in/2010/12/get-ip-info.html

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Commented:
yes the problem is to get the subnet information for these IP addresses from netlogon.

any suggestions how to get this information?
You have the IP list and it's easy to convert to Subnet, mostly it's /24
Change the last bit to 0 and add /24 on each IP

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