Beginning June 26, 2021, functioning of sys.ne.jp was checked 6 times over the next 1 831 days. During the entire set of tests, sys.ne.jp was accessible 2 times, most recently on May 25, 2026, responding with a 200 status code. There were 4 times sys.ne.jp was unreachable when checked, equal to 66.67%, most recently on September 3, 2021. As of July 2, 2026, every response has confirmed that there are none with an error status. Records show the May 25, 2026, sys.ne.jp response at 3.042 seconds, contrasted with the 1.778 seconds average.