The operability of zi.de was checked 9 times during a period of 2 039 days, beginning on July 10, 2019. With the last time on March 10, 2024, when a code 200 was returned, zi.de was up 9 times out of all the checks conducted. As of February 8, 2025, there were no periods of inactivity for zi.de throughout all checks. Of the responses received as of February 8, 2025, none were reported to contain an error status. The response time on March 10, 2024, was 0.118 seconds, compared to the average of 0.997 seconds on zi.de.