Free IP Subnet Calculator
计算IP子网、掩码、主机范围和广播地址。
Frequently Asked Questions
Is the 子网计算器 free to use?
Yes, the 子网计算器 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the 子网计算器 work?
计算IP子网、掩码、主机范围和广播地址。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the 子网计算器?
No installation needed. The 子网计算器 runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the 子网计算器?
Completely safe. The 子网计算器 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the 子网计算器 work offline?
After the page loads for the first time, the 子网计算器 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or WHOIS lookups) require an active connection.
How current is the data returned by the 子网计算器?
The 子网计算器 fetches live data in real time each time you run it. Results reflect the current state of the server or domain at the moment of the request.