MAC Address Vendor Lookup
Identify manufacturers from MAC prefixes.
IPv4 Subnet Calculator
Network masks, wildcards, and host ranges.
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About IPv4 Subnet Calculator
Enter an IP and prefix or netmask to see network address, broadcast, usable hosts, and wildcard mask.
📐 Methodology & Reference Accuracy:
Calculations, formulas, and conversions execute locally in your web browser. Output models are benchmarked against official reference standards and updated for 2026.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Background reading: Ipv4 Subnet Calculator on Wikipedia. More: all security & network.
Frequently Asked Questions about IPv4 Subnet Calculator
How do I use the IPv4 Subnet Calculator?
Open the IPv4 Subnet Calculator and use the controls in the workspace below: network masks, wildcards, and host ranges. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Is the IPv4 Subnet Calculator free?
Yes. The IPv4 Subnet Calculator is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
Does the IPv4 Subnet Calculator store or share my data?
No. The IPv4 Subnet Calculator runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
What can I use the IPv4 Subnet Calculator for?
Enter an IP and prefix or netmask to see network address, broadcast, usable hosts, and wildcard mask. You will find it grouped under Security & Network together with 13 other free tools on the PrimeFreeTools homepage.
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Sep 16, 2026
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Network masks, wildcards, and host ranges.
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