6 tests were conducted on the operability of lk21.li over the 1 184 days starting on August 29, 2021. The most recent uptime recorded on January 19, 2023, giving a 200 code, lk21.li was functional 4 times throughout all tests performed. 33.33% of checks carried out, which is 2 times, resulted in lk21.li being down, including on April 8, 2024, for the most recent one. Every response obtained as of November 25, 2024, has been confirmed to be without any errors. Lk21.li's response time on April 8, 2024, was — seconds, with an average of 0.911 seconds.