Within the 2 003 day time frame starting on June 4, 2019, there have been 3 tests done on sci.cn's availability. All evaluations confirmed that sci.cn was either inaccessible or experiencing operational difficulties as of November 27, 2024. Inspecting sci.cn as of November 27, 2024, revealed that no unavailability periods had occurred. The response dated May 23, 2024, with code 403 was the most current out of the 3 error instances. 3.021 seconds was the recorded response time, against an average of 2.683 seconds, for sci.cn on May 23, 2024.