SubNet Classer — Libor Benes

Accurate IPv4 analyzer, complementing SubNet Calc.
• Enter an IPv4 address and optional CIDR (e.g., 192.168.1.1/24) to get detailed output.
• Copy results as plain text for documentation or monospaced editors (e.g., Notepad++, Excel).
• View IPv4 class table.

Security Prioritization:
• Minimal Design: Compact sidebar.
• Offline Operation: All calculations are local, ensuring privacy. No user data is collected or transmitted.
• Minimal Permissions.
• Safe Coding.
• Mozilla Compliance.
• Safe Error Handling.
• No Dependencies.