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Nested If revolving around IP addresses & subnet masks

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    Nested If revolving around IP addresses & subnet masks

    Hi everyone,

    I'm trying to accomplish the following:

    Have a some logic around checking an IP address against say 30 subnet ranges. We'll say Cell F2 has 10.1.1.1, I need to build something to check if that cell contains something in this range:

    > 10.1.0.0 AND <10.1.255.255, "Insert Subnet Name", if not
    is it > 10.2.0.0 AND <10.2.255.255, "Insert Subnet Name", if not
    is it > 10.3.0.0 AND <10.3.255.255, "Insert Subnet Name", if not
    Etc for another 30 subnets.

    I've made it work for one (obviously pretty easy), but when I had to nest them together it got complex and out of my depth. I have roughly 7000 cells I have to apply this to, and will just be filling the formal down the entire sheet for F3, F4, F5 etc.

    Any help would be very appreciated.

    TJ

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    Forum Guru TMS's Avatar
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    Re: Nested If revolving around IP addresses & subnet masks

    You could create a table of IP Address ranges. In reality, you only need the first two octets so you can extract them and use a VLOOKUP against a table.

    Have a look at the example workbook to see how this might work.


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    Re: Nested If revolving around IP addresses & subnet masks

    I would use an index/match against a table, and as only the first 2 parts are actually needed, it makes it pretty simple
    see attached

    Hope this helps

    EDIT-
    Darn, beat again...lol
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    Forum Guru TMS's Avatar
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    Re: Nested If revolving around IP addresses & subnet masks

    Darn, beat again...lol
    Way beat ...

    But very similar solutions ... and same comment about the structure.

    Regards, TMS

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    Re: Nested If revolving around IP addresses & subnet masks

    Thanks TM, got caught on the phone and forgot to refresh before posting...lol

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    Re: Nested If revolving around IP addresses & subnet masks

    This is exactly what I was looking for. I've adapted it and it works like a charm. Thanks for taking the time to help, it's appreciated.

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    Forum Guru TMS's Avatar
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    Re: Nested If revolving around IP addresses & subnet masks

    You're welcome.

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