In the time period starting February 14, 2021, and lasting 1 374 days, w3c.at's availability was checked 6 times. The latest uptime on December 8, 2021, resulted in a code 200, indicating that w3c.at was operational in 5 instances across all tests. Out of all the times w3c.at was checked, it was unreachable for 1 of them, equivalent to 16.67%, including as recently as October 3, 2022. Based on the responses that were received, as of November 19, 2024, every response has been free of errors. W3c.at's response time averaged 0.074 seconds, with a recorded response time of — seconds on October 3, 2022.