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IP subnet calculator
172.217.20.96-172.217.21.31

uk ru

172.217.20.96-172.217.20.127
172.217.20.96/27

172.217.20.128-172.217.20.255
172.217.20.128/25

172.217.21.0-172.217.21.31
172.217.21.0/27