A total of 4 availability checks of sumtel.ru were performed during the 1 439 day period starting from December 9, 2020. Out of all the checks that were made, sumtel.ru was reachable 4 times, with the most recent one receiving a 200 code on February 5, 2023. Inspections conducted as of November 18, 2024, reveal that there were no periods of unavailability on sumtel.ru. As of November 18, 2024, based on the replies received, no errors had been reported in any of the responses. Contrasting with the average response time of 0.111 seconds, sumtel.ru's response on February 5, 2023, was 0.001 seconds.