Records indicate 2 uptime checks were performed for challenge-21c.co.jp in the 2 107 days following February 11, 2019. Challenge-21c.co.jp returned a code 200 and was reachable 2 times out of all conducted tests, the last time being on February 2, 2021. As of November 18, 2024, checks of challenge-21c.co.jp showed no occurrences of offline times. The replies obtained as of November 18, 2024, affirm that no response contained an error status. Challenge-21c.co.jp's 2.856 seconds average response time differed from its 2.818 seconds reply on February 2, 2021.