Worked on the zephyrproject-rtos/openthread repository to address a critical issue in NAT64 mapping counters, focusing on improving telemetry accuracy and reliability for embedded network systems. Using C and C++, applied expertise in IPv4, IPv6, and NAT64 to ensure counters were properly cleared when allocating new mapping table items, preventing stale or misleading statistics. Developed and integrated targeted tests to verify the reset behavior and guard against regression, validating all changes through continuous integration pipelines. This work enhanced the reliability of NAT64 diagnostics and resource planning, reflecting a careful, test-driven approach to network engineering and embedded systems development.