From December 29, 2020, to the present 1 424 days, smm.cn has been checked 4 times for availability. Out of the total number of checks attempted, smm.cn was operational 4 times, last recorded on November 19, 2024, and responded with a 200 status code. No inactivity periods were observed for smm.cn as of November 22, 2024, during assessments. All the replies received confirm that as of November 22, 2024, there was no reply with an error status. Contrasting with the average response time of 4.185 seconds, smm.cn's response on November 19, 2024, was 0.001 seconds.