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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…

Automate · Start free
Automation Workshop
Your IP?
IP: 3.15.187.205 more
Local IP: .
Sponsored content
Request header
Size: 213 bytes more
Your quotes
SilverBench · Very good online benchmark. Specially when you OC your CPU. This test will make or break it! I used it to test my system on several occasions. I hope you will do more benchmarks for GPU and other hardware.
—Anonymous
Performance
Done in 0.00252 seconds
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