| Domain | Date |
| ntp.polycom.com | 2025-03-21 |
| time.danahi.com | 2025-03-05 |
| 2.zscaler.pool.ntp.org | 2025-01-28 |
| time.nasuni.com | 2024-11-28 |
| ntp.spiderhost.com | 2024-11-22 |
| ntp.trustwave.com | 2024-11-22 |
| 0.aerohive.pool.ntp.org | 2024-09-09 |
| t2.hshh.org | 2024-04-06 |
| 2.android.pool.ntp.org | 2024-02-28 |
| 3.centos.pool.ntp.org | 2021-01-11 |
| 0.clearlinux.pool.ntp.org | 2021-01-09 |
| 0.arch.pool.ntp.org | 2020-12-07 |
| 1.cloudgenix.pool.ntp.org | 2020-09-12 |
| 0.ubnt.pool.ntp.org | 2020-05-26 |
| 0.nettime.pool.ntp.org | 2019-10-19 |
| t1.hshh.org | 2019-10-03 |
| 3.pool.ntp.org | 2019-09-02 |
| 0.us.pool.ntp.org | 2019-08-31 |
| 2.pool.ntp.org | 2019-08-11 |
| 3.us.pool.ntp.org | 2019-08-05 |
| 3.amazon.pool.ntp.org | 2019-07-16 |
| 1.nettime.pool.ntp.org | 2019-02-10 |