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IPv4 Subnet Calculator



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IPv4 Address Converter


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Evaluate arithmetic expressions and powers.


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How it works
Worked example and practical uses
Important limitations
Frequently asked questions
Is this tool free?
Yes. YARVICO provides this calculator without requiring an account.
Are the results always accurate?
Check the tool-specific limitations above. Verify important results against trusted independent references.
Do I need to install software?
No. This tool runs in a modern web browser.


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Home / IT & Cybersecurity Tools / IPv4 Subnet Calculator


NETWORKING TOOLKIT
IPv4 Subnet Calculator
Find your network address, broadcast address, subnet mask, wildcard mask and usable IP range. Free, fast and processed locally in your browser.


Calculate your subnet
Enter an IPv4 address and a CIDR prefix from /0 to /32.
Your address is calculated on this device. No IP lookup or server request is made.




What is an IPv4 subnet calculator?
An IPv4 subnet calculator determines the network boundaries of an IP address and CIDR prefix. It helps network administrators, cybersecurity analysts and students plan address ranges and check routing configurations.
How to use this calculator
  1. Enter an IPv4 address such as 192.168.1.100.
  2. Enter a prefix length such as 24.
  3. Select Calculate subnet to see the network, mask, broadcast and usable address range.
  4. Use Copy results to paste the output into your notes.
Worked example: 192.168.1.100/24
The /24 prefix means that 24 bits identify the network and 8 bits remain for addresses. The subnet mask is 255.255.255.0, the network is 192.168.1.0, and the broadcast address is 192.168.1.255. For an ordinary subnet, the usable range is 192.168.1.1 through 192.168.1.254, or 254 host addresses.
Frequently asked questions
What does /24 mean?
It specifies 24 network bits in a 32-bit IPv4 address. That leaves 256 total addresses, typically 254 usable host addresses.
What is a wildcard mask?
It is the bitwise inverse of the subnet mask. For /24, the wildcard mask is 0.0.0.255.
Why are /31 and /32 different?
A /31 is often used for point-to-point links under RFC 3021, with both addresses available as endpoints. A /32 represents one address, often used for host routes. These are not ordinary multi-host broadcast subnets.
Does this tool scan my network?
No. It performs mathematical calculations in your browser and does not probe or connect to any IP address.
Related networking tools
CIDR ConverterIPv4 Address ConverterAll YARVICO tools
Educational reference only. Verify addressing and routing decisions against your actual network design.








          

        

          

        









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YARVICO · Transparency
How YARVICO handles information when you use our website, tools, and articles.


Review before publication: Our site operator's legal identity and jurisdiction, analytics consent settings, retention details, and any additional embedded services have not yet been confirmed. This is a tailored draft, not a verified statement of legal compliance.


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YARVICO's tools are designed to process user-entered calculations and inputs in your browser rather than transmit those inputs to YARVICO servers or external calculation APIs. This statement concerns tool inputs; it does not mean that visiting the website is free of hosting logs, cookies, or analytics data. Do not enter highly sensitive information unless you have independently assessed the tool's suitability.


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We use information to operate and maintain the website, respond to inquiries, and understand site usage through analytics. Service providers may process information to deliver these functions. 


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YARVICO provides general-audience educational and utility content and is not designed specifically for children. If you believe a child has sent us personal information, please contact us.


11. Changes
We may update this policy as our services or legal obligations change. The current version will appear on this page.
Effective date: 11/06/2026.





















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