2020-06-17-----2025-01-12 ch.pool.ntp.org

2020-03-30-----2024-12-16 swisstime.ethz.ch

2024-07-08-----2024-07-08 2.ch.pool.ntp.org

2024-01-29-----2024-01-29 2.europe.pool.ntp.org

2019-08-30-----2023-12-19 europe.pool.ntp.org

2022-11-21-----2022-11-21 0.datadog.pool.ntp.org

2022-05-07-----2022-05-07 ntp.sjtu.edu.cn

2021-07-12-----2021-07-12 1.ch.pool.ntp.org