2021-06-06-----2021-06-06 1.nettime.pool.ntp.org

2017-10-18-----2021-05-21 us.pool.ntp.org

2020-07-01-----2021-03-23 north-america.pool.ntp.org

2021-02-24-----2021-02-24 1.openwrt.pool.ntp.org

2019-10-16-----2021-02-20 0.us.pool.ntp.org

2017-11-22-----2021-02-19 1.us.pool.ntp.org

2021-02-19-----2021-02-19 3.us.pool.ntp.org

2020-11-09-----2020-11-09 ntp1.tummy.com

2020-03-09-----2020-08-03 pool.ntp.org

2020-06-17-----2020-06-17 2.ubuntu.pool.ntp.org

2020-04-13-----2020-05-12 ntp.sjtu.edu.cn

2020-03-30-----2020-03-30 3.android.pool.ntp.org

2020-01-09-----2020-01-09 0.ubuntu.pool.ntp.org

2019-12-17-----2019-12-17 3.centos.pool.ntp.org

2019-07-16-----2019-12-07 2.android.pool.ntp.org