2020-03-31-----2024-04-24 swisstime.ethz.ch

2022-05-25-----2024-04-03 ntp.home4u.ch

2020-06-22-----2024-02-02 2.ch.pool.ntp.org

2021-08-05-----2023-08-30 1.europe.pool.ntp.org

2020-09-22-----2023-04-19 ch.pool.ntp.org

2021-02-17-----2023-01-20 pool.ntp.org

2019-09-04-----2022-12-22 europe.pool.ntp.org

2019-06-30-----2022-11-27 tr.pool.ntp.org

2022-05-25-----2022-06-26 ntp2.home4u.ch

2020-06-22-----2020-06-22 3.europe.pool.ntp.org

2020-06-17-----2020-06-17 3.ch.pool.ntp.org