What is CIDR?
Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing.
Subnet Calculator — Professional Networking Utility
Calculate network subnets and CIDR masks • Visual breakdown of IP ranges and host capacities
Last updated: May 2026
Developer Tools 0.0(0 Reviews)
Calculate IPv4 subnets, network masks, and host ranges with our professional CIDR calculator. Visual breakdown of usable IP addresses for network engineers and sysadmins.
• Fact-Checked & Verified•Compliance: 2026 Standards•Last Updated: May 2026
01
Why Use our IPv4 Subnet Calculator?
Calculate IPv4 subnets, network masks, and host ranges with our professional CIDR calculator. Visual breakdown of usable IP addresses for network engineers and sysadmins.
How it works
The tool performs bitwise operations on the IP address and the subnet mask to determine the boundaries of the network segment.
02
Key Features of IPv4 Subnet Calculator
CIDR and traditional mask support
Visual binary representation of masks
Usable host range identification
Support for all IPv4 classes (A, B, C)
03
Common Questions About IPv4 Subnet Calculator
How many hosts are in a /24 network?
A /24 network has 256 addresses, with 254 usable for hosts.
Looking for more professional developer utilities?
Explore All WebToolkit Pro ToolsEditorial Standards & Processing Transparency
This utility is engineered and maintained under strict editorial and technical standards. All source calculations are audited against official formatting standards and RFC specifications to guarantee mathematical and logic accuracy.
Content Creation & Automation Transparency: To ensure our dynamic developer specifications and reference datasets remain fully comprehensive and updated against newly released RFC updates, this page compiles technical documentation using advanced programmatic retrieval tools. Every output data block, feature list, and system specification is subsequently audited, fact-checked, and verified by our systems engineers for absolute correctness and accuracy.
Security Guarantee: To guarantee absolute user privacy, this tool executes 100% client-side inside your web browser. None of your input strings, payloads, keys, or files are ever transmitted to a server or stored externally.
Built by Abu Sufyan • Also explore: Severance Calculator & TradeConvert
Further Reading
Expert guides and technical research related to this tool.
Developer Tools6 min read
Best Online Diff Checker Tools: The Engineering & Privacy Guide
A privacy-focused comparison of the top online diff tools in 2026. We examine which tools process code server-side vs client-side and which support syntax highlighting.
Read Full Post
Developer Tools7 min read
Understanding Cron Expression Generators in 2026
Generate and validate Unix, Quartz, and AWS cron expressions instantly. Clean English scheduler translation. 100% secure client-side editor.
Read Full Post
Developer Tools22 min read
WordPress REST API Data Handling: High-Performance JSON Fetching and CSV Serialization
How to fetch WordPress REST API data — posts, users, and WooCommerce orders — and export it to CSV without a plugin using JavaScript and our JSON to CSV converter.
Read Full Post