Free IP Subnet Calculator
IPサブネット、マスク、ホスト範囲、ブロードキャストアドレスを計算します。
Frequently Asked Questions
Is the サブネット計算機 free to use?
Yes, the サブネット計算機 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the サブネット計算機 work?
IPサブネット、マスク、ホスト範囲、ブロードキャストアドレスを計算します。 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 サブネット計算機?
No installation needed. The サブネット計算機 runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the サブネット計算機?
Completely safe. The サブネット計算機 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the サブネット計算機 work offline?
After the page loads for the first time, the サブネット計算機 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 サブネット計算機?
The サブネット計算機 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.