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Free online network tools & utilities

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Subnet Calc - compute network subnet (dotted decimal or CIDR notation) mask for IP address or range, or vice versa. Determine number of hosts, broadcast address and host class.


8.8.8.8 or 192.0.34.164


Select 255.255.255.0 · /24 or 255.0.0.0 · /8

Random examples…

Your IP?
IP: 18.208.132.33 more
Local IP: .
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