In the time frame of 1 378 days beginning February 17, 2021, dns.cz's availability was checked 8 times. Dns.cz, during all tests, proved its functionality 8 times, with the latest uptime on June 29, 2021, confirming a response of code 200. Tests carried out on dns.cz showed that there were no instances of inactivity as of November 26, 2024. The results of the responses received as of November 26, 2024, showed that none of the replies had an error status. On June 29, 2021, in contrast to the average of 0.448 seconds, for dns.cz recorded a response time of 0.095 seconds.