There were 4 times over the 1 252 day period starting on June 29, 2021, that cnst.nist.gov's accessibility was checked. As of December 2, 2024, all checks confirmed that cnst.nist.gov was either inaccessible or encountering other problems. Cnst.nist.gov experienced downtime 4 times, or 100.00% of checks performed, the most recent being on July 8, 2021. No reports of error statuses in the responses received have been made as of December 2, 2024. The July 8, 2021, response time of cnst.nist.gov was — seconds, compared to an average of 0.001 seconds.