ICMP Types & Codes per Libor Benes

An essential tool for network diagnostics, troubleshooting, debugging, and analysis. Ideal for network engineers, system administrators, security researchers, developers, and students.

ICMP Types and Codes sourced from the Internet Assigned Numbers Authority (IANA: https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xhtml, last updated 2025-04-29).

• Includes all - assigned, unassigned, deprecated, reserved - ICMP Parameters.
• Dynamic Search in Real-Time.
• Sort by Type (numerical) or Name (alphabetical) with one click.
• Category Filtering: Toggle between error messages (types 0–127) and informational messages (types 128–255).
• Copy to Clipboard for use in reports, logs, or tools like Wireshark.

Security a Core Priority ensuring user trust and browser integrity:
• Minimal Permissions, no unnecessary access to browser data.
• Offline Operation: All ICMP data is stored locally, eliminating network requests and ensuring functionality without internet access.
• Safe Coding Practices.
• No Third-Party Dependencies.
• Privacy-Focused: Does not collect, store, or transmit any user data, prioritizing user privacy.
• Adheres to Mozilla’s strict security standards for Firefox add-ons.