I use to have a bookmark for an amazing web site tool that would take a list of CIDR networks, could be 100's or 1000's, and calculate ALL of the narrowest-possible CIDRs for the entire set.
For example I could put in:
10.10.0.0/24 10.10.1.0/24 10.10.2.0/24 10.10.4.0/24 10.10.5.0/24 It would output:
10.10.0.0/23 10.10.2.0/24 10.10.4.0/23 But I can't find this calculator anymore. All the CIDR calculators I can find with a Google search do not do the analysis of the whole range and narrow down excluding the ones NOT specifically needed (in the example above see that 10.10.3.0/24 is excluded, but the tools I've found would not exclude it). Does anyone have this tool bookmarked and can share with me please?
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