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IP subnet calculator
3.123.45.0-3.123.128.255

uk ru

3.123.45.0-3.123.45.255
3.123.45.0/24

3.123.46.0-3.123.47.255
3.123.46.0/23

3.123.48.0-3.123.63.255
3.123.48.0/20

3.123.64.0-3.123.127.255
3.123.64.0/18

3.123.128.0-3.123.128.255
3.123.128.0/24