Ders.us's availability has been inspected 3 times in the 2 134 days from January 26, 2019, until now. The operational status of ders.us was confirmed 1 times during conducted checks, the most recent on January 26, 2019, providing a response with a code 200. There have been 2 instances of downtime for ders.us, with the most recent one taking place on November 8, 2021, constituting 66.67% of all inspections. There were no error responses reported as of November 29, 2024, according to the received replies. On November 8, 2021, — seconds contrasted with the 0.730 seconds average response time noted for ders.us.