2020-02-23-----2025-03-18 pool.ntp.org

2024-06-30-----2025-01-28 ntp.polycom.com

2021-07-21-----2024-12-08 north-america.pool.ntp.org

2021-02-19-----2024-10-17 0.us.pool.ntp.org

2019-02-02-----2023-12-02 us.pool.ntp.org

2022-03-14-----2023-10-25 0.north-america.pool.ntp.org

2023-09-24-----2023-09-24 1.nettime.pool.ntp.org

2023-05-04-----2023-05-04 2.centos.pool.ntp.org

2022-01-28-----2022-06-21 2.us.pool.ntp.org

2021-12-30-----2022-05-25 1.us.pool.ntp.org

2022-02-02-----2022-02-02 3.ubnt.pool.ntp.org

2021-12-31-----2021-12-31 3.us.pool.ntp.org

2021-12-09-----2021-12-09 3.nettime.pool.ntp.org

2020-01-30-----2020-10-31 0.pool.ntp.org

2020-05-08-----2020-05-08 1.amazon.pool.ntp.org

2020-02-15-----2020-02-15 rru.com