NetblockToDNSName SS

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This transform will speak to Serversniff and Robtex and ask them to give us all reverse DNS records they have for the supplied network. It gets a bit messy - what happens when you have a class B network? As such the providers have limitations. Robtex wont return reverse DNS entries for networks larger than 2048 IPs (that's 4 class Cs) and Serversniff won't be impressed if you run a block larger than a class B. Keep in mind that you need to adjust your slider accordingly (if your slider is on the first notch and you reverse a class C you'll only get 12 entries back). Also - note that this information comes from a database - so it might not always be up to date. The transform can take a while to run - so be patient. It still beats doing it manually...

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