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IP subnet calculator
217.144.53.0-217.144.63.255

uk ru

217.144.53.0-217.144.53.255
217.144.53.0/24

217.144.54.0-217.144.55.255
217.144.54.0/23

217.144.56.0-217.144.63.255
217.144.56.0/21