There have been 2 tests conducted on lookupbyisbn.com's uptime in the 1 253 days starting June 18, 2021, up until today. Lookupbyisbn.com was online 2 times out of all checks performed, as shown by the code 200 response on the latest test conducted on October 15, 2021. In all evaluations conducted as of November 22, 2024, lookupbyisbn.com had no recorded incidents of inaccessibility. Every response received affirms that, as of November 22, 2024, no error statuses have been detected. Lookupbyisbn.com's October 15, 2021, response time of 3.545 seconds differed from its 4.352 seconds average response time.