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IP subnet calculator
222.121.16.0-222.122.255.255

uk ru

222.121.16.0-222.121.31.255
222.121.16.0/20

222.121.32.0-222.121.63.255
222.121.32.0/19

222.121.64.0-222.121.127.255
222.121.64.0/18

222.121.128.0-222.121.255.255
222.121.128.0/17

222.122.0.0-222.122.255.255
222.122.0.0/16