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IP subnet calculator
221.6.176.0-221.12.191.255

uk ru

221.6.176.0-221.6.191.255
221.6.176.0/20

221.6.192.0-221.6.255.255
221.6.192.0/18

221.12.0.0-221.12.127.255
221.12.0.0/17

221.12.128.0-221.12.191.255
221.12.128.0/18

221.7.0.0-221.7.255.255
221.7.0.0/16

221.8.0.0-221.11.255.255
221.8.0.0/14