Network Tools
Free network tools that run entirely in your browser.
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Subnet Calculator
Calculate IP subnet details and ranges
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IP Address Lookup
Get details about any IP address
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DNS Lookup
Look up A, MX, CNAME, and other DNS records
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Port Checker
Check if a TCP port is open on any host
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Public IP Lookup
Find your public IP address
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CIDR to IP Range
Expand CIDR to full IP range details
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MAC Generator
Generate random MAC addresses