Welcome to IvensTraining time server
This website has some useful information about using the provided ntp web service.
Feel free to use the open access ntp timeserver for syncronizing time on your computers or IoT devices as long as you are respecting the guidlines for open access time servers. Please use the server name time.eldshort.de to get the server addresses for your favored protocol. The server uses the ntp standard port 123 on both, IPv4 and IPv6. If you want to force IPv4 or IPv6 use time4.eldshort.de or time6.eldshort.de. I recommend to use DNS, while the IP-addresses may change sometimes (very seldom).
This server is also listet within the ntp pool project and part of the pool de.pool.ntp.org.