4 times sis-verlag.de's availability was checked over the 544 day time frame starting on June 29, 2023. Uptime checks indicate 4 instances of accessibility of sis-verlag.de, including on March 28, 2024, which returned a 200 status code. Testing shows that there have never been any inoperability issues with sis-verlag.de as of December 25, 2024. According to every response obtained as of December 25, 2024, none contained an error status code. Records indicate sis-verlag.de responded in 0.201 seconds on March 28, 2024, compared to 0.246 seconds on average.