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IP subnet calculator

uk ru

213.251.152.0-213.251.159.255
213.251.152.0/21

213.251.160.0-213.251.175.255
213.251.160.0/20

213.251.176.0-213.251.183.255
213.251.176.0/21

213.251.184.0-213.251.187.255
213.251.184.0/22