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NTP Server Online Tester

This tool is useful to check if a given Network Time Protocol server is reachable over the internet using IPv4 and IPv6 connectivity.

It is also useful for knowing the resulting offset using the exact time of stratum 2 NTP public server.

It uses ntpdate -q to perform a time synchronization query which works for linux servers, windows servers, etc.

This website IPv4 and IPv6 addresses are 2a02:c207:1:3259:1::1 and

The following tasks may help you pass this server test in case of trouble: Recommended for linux server admins and linux users:

How to join your linux server to the NTP pool project
How to query and test an NTP server using ntpdate