Finally, I rejoined the ntppool.org project again. Several years ago, I already contributed with several stratum 1 systems which were connected to a Stratum 0 (GPS). Nowadays, most ones do not care about NTP and time synchronization anymore but it gets more important than ever when it comes to encryption, authentication and logging. Therefore, I took my old Stratum 0 GPS systems and created four new ntp server which are also included within the nto pool project. But of course, you are also able to use them directly without using the pool. You can also find the NTP statistics right here.

Server: ntp01.gyptazy.com
IPv4: 5.252.225.40
IPv6: 2a03:4000:40:98::1337
Stratum: 1
Location: Nürnberg, Germany

Server: ntp02.gyptazy.com
IPv4: 45.157.178.14
IPv6: 2a03:4000:4b:6e::1337
Stratum: 1
Location: Nürnberg, Germany

Keep in mind: NTP is vulnerable to Man-in-the-Middle (MITM) attacks and you should therefore use NTS. All systems listed here also support NTS and are also reachable in the DN42 network.