The data indicates isbn.pl was inspected for availability 3 times in the 2 100 days following February 19, 2019. All tests performed as of November 19, 2024, indicated that isbn.pl was facing difficulties or was not reachable. Isbn.pl experienced downtime 3 times during checks conducted, representing 100.00%, most recently July 26, 2021. All responses obtained as of November 19, 2024, have been reported as having no error status codes. On July 26, 2021, the response time of isbn.pl was — seconds, which is 0.001 seconds on average.