Records show sibur.ru's operability was checked 22 times from June 25, 2021, through the subsequent 1 617 days. Confirming operability 21 times total, sibur.ru most recently returned a 200 status code on November 10, 2025, according to tests conducted. No instances of sibur.ru being down occurred during the inspections that were conducted as of November 28, 2025. The error response coded 403, the most recent out of the 1 responses that contained errors, was noted on August 22, 2025. Sibur.ru's November 10, 2025, response time, 1.227 seconds, differed from the 1.306 seconds average.