GeoIP needs to be implemented

[endail]

Ultimately, checking the physical location of the IP address would be most ideal to identify where an NTP server is located.

https://hackertarget.com/geoip-ip-location-lookup/

$ curl https://api.hackertarget.com/ipgeo/?q=203.14.0.250
IP Address: 203.14.0.250
Country: Australia
State:
City:
Latitude: -33.494
Longitude: 143.2104

Also seems to handle hostnames.

$ curl https://api.hackertarget.com/ipgeo/?q=tic.ntp.telstra.net
IP Address: 203.14.0.250
Country: Australia
State:
City:
Latitude: -33.494
Longitude: 143.2104

https://ip-api.com/docs/api:newline_separated#test