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IP subnet calculator
183.103.71.0-183.103.88.255

uk ru

183.103.71.0-183.103.71.255
183.103.71.0/24

183.103.72.0-183.103.79.255
183.103.72.0/21

183.103.80.0-183.103.87.255
183.103.80.0/21

183.103.88.0-183.103.88.255
183.103.88.0/24