In the period of 1 161 days starting on November 7, 2021, analysis indicates phys4.harvard.edu underwent 7 accessibility tests. Out of every check done, phys4.harvard.edu was accessible 1 times, with the November 7, 2021, check returning a 200 status response. According to assessments completed as of January 12, 2025, there were no periods of inoperability for phys4.harvard.edu. Code 400 represented the latest error among the 6 error responses, observed on January 10, 2025. Records indicate a 0.045 seconds phys4.harvard.edu response time on January 10, 2025, compared to 0.235 seconds on average.