Throughout the 1 975 day period beginning on July 30, 2019, viriato.isr.ist.utl.pt's operability was checked 5 times. Based on checks conducted as of December 25, 2024, viriato.isr.ist.utl.pt was found to be either unreachable or encountering problems. 5 evaluations showed viriato.isr.ist.utl.pt to be down, comprising 100.00% of all tests performed, with the most recent case on September 15, 2021. As of December 25, 2024, there are no recorded instances of error status codes, according to the responses that were received. While averaging 0.001 seconds, viriato.isr.ist.utl.pt responded in — seconds on September 15, 2021.