3 operability checks occurred for call4call.de within the time frame of 990 days after March 8, 2022. Reports confirmed that call4call.de was not accessible or encountered problems during all tests conducted as of November 23, 2024. Based on inspections made as of November 23, 2024, there were no instances of inoperability on call4call.de. On December 4, 2022, there were a total of 3 responses that encountered errors, and the most recent error recorded was code 404. The December 4, 2022, response time of call4call.de was 0.716 seconds, compared to an average of 0.411 seconds.