The accessibility of cas.cn was reviewed 12 times over 1 440 days beginning January 31, 2021, as shown by the data. Returning a 200 code on the last instance of December 31, 2024, cas.cn was accessible 12 times among all the tests done. As of January 10, 2025, testing indicates that there had been no instances of inoperability for cas.cn. There have been no reported errors as of January 10, 2025, according to the responses that have been received. Cas.cn's 4.382 seconds reply on December 31, 2024, contrasted its 2.939 seconds average response time.