NTP
From SHA2017 Wiki
NTP-Servers
Everyone wants to know how late it is. Therefore the Projects:TimeOperationsCentre provides some Stratum 1 servers. Unfortunately for space reasons, those are just 2 Raspberry PIs. Therefore it would be cool if you could provide your own Stratum 2 servers. (Or Stratum 1, we do have a PPS signal on 50 Ohm BNC available)
NTP Stratum 1 Servers
Here will be those 2 Stratum 1 servers.
Currently there is only one server online. The IP is 151.216.39.36
NTP Stratum 2 Servers
If you are operating a Stratum 2 server, please add it to this list. In case of load problems, access to the Stratum 1 Servers may be limited to these addresses.