
SubNet Calc ์ ์์: Libor Benes
The sidebar calculates IPv4 subnets. Computes network addresses, broadcast addresses, host ranges, and the number of usable hosts.
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SubNet Calc is an essential tool for network planning, troubleshooting, and education, combining simplicity, accuracy, and privacy in a compact Firefox sidebar. Designed for network engineers, sysadmins, network analysts, and students to effortlessly calculate IPv4 (not IPv6) subnets.
Enter an IPv4 address, a CIDR mask, and the desired number of subnets => get instantly a table with detailed subnet information. Copy results, paste into network documentation or monospaced editors or spreadsheets. Tab-separated output aligns best in monospaced editors (e.g., Notepad++) or Excel; alignment in non-monospaced editors (e.g., Windows Notepad) or WPS Office may vary.
Security Prioritization:
โข Minimal Design.
โข Offline Operation: Performs all calculations locally, requiring no network access, ensuring privacy - no user data is collected, stored, or transmitted.
โข Minimal Permissions.
โข Safe Coding and DOM Manipulation.
โข Adheres to Moz://a standards for Firefox add-ons, ensuring compatibility and security.
โข Error Handling.
SubNet Calc relies on ipaddr.js, a lightweight, MIT-licensed JavaScript library (version 2.2.0, 13 KB) for parsing and validating IPv4 addresses. ipaddr.js is a part of the add-on's local codebase, no network connections, sourced from https://github.com/whitequark/ipaddr.js. ipaddr.js ensures accurate and safe IP address handling, enabling reliable subnet calculations and input validation.
Enter an IPv4 address, a CIDR mask, and the desired number of subnets => get instantly a table with detailed subnet information. Copy results, paste into network documentation or monospaced editors or spreadsheets. Tab-separated output aligns best in monospaced editors (e.g., Notepad++) or Excel; alignment in non-monospaced editors (e.g., Windows Notepad) or WPS Office may vary.
Security Prioritization:
โข Minimal Design.
โข Offline Operation: Performs all calculations locally, requiring no network access, ensuring privacy - no user data is collected, stored, or transmitted.
โข Minimal Permissions.
โข Safe Coding and DOM Manipulation.
โข Adheres to Moz://a standards for Firefox add-ons, ensuring compatibility and security.
โข Error Handling.
SubNet Calc relies on ipaddr.js, a lightweight, MIT-licensed JavaScript library (version 2.2.0, 13 KB) for parsing and validating IPv4 addresses. ipaddr.js is a part of the add-on's local codebase, no network connections, sourced from https://github.com/whitequark/ipaddr.js. ipaddr.js ensures accurate and safe IP address handling, enabling reliable subnet calculations and input validation.
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์ถ๊ฐ ์ ๋ณด
- ๋ถ๊ฐ ๊ธฐ๋ฅ ๋งํฌ
- ๋ฒ์
- 1.0
- ํฌ๊ธฐ
- 18.32 KB
- ๋ง์ง๋ง ์ ๋ฐ์ดํธ
- 2๋ฌ ์ (2025๋ 8์ 11์ผ)
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- ๋ผ์ด์ ์ค
- Mozilla Public License 2.0
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- ๋ชจ์์ง์ ์ถ๊ฐ