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IP subnet calculator
136.243.0.0-136.243.24.255

uk ru

136.243.0.0-136.243.15.255
136.243.0.0/20

136.243.16.0-136.243.23.255
136.243.16.0/21

136.243.24.0-136.243.24.255
136.243.24.0/24