There were 3 tests conducted on ntt.co.jp's availability in the 1 921 days after August 16, 2019. Responding with a code 200, ntt.co.jp was operational 2 times, most recently on August 16, 2019, out of every check attempted. As of November 18, 2024, ntt.co.jp had no reported downtime incidents in tests conducted. On November 17, 2024, code 410 represented the most recent error among the 1 responses that included errors. The November 17, 2024, response time of 2.996 seconds for ntt.co.jp differed from its average of 2.392 seconds.