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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: 3.138.122.90 more
Local IP: .
Sponsored content
Request header
Size: 213 bytes more
Your quotes
SilverBench · Thanks to this tool I can warm up with my PC when it's cold :) Thanks!
—Anonymous
Performance
Done in 0.00252 seconds
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