以下是来自世界各地的时间同步服务器
pool.ntp.org: the internet cluster of ntp servers
https://publicntp.org/
ntp服务器地址大全|网络时间同步服务器地址 - 站长工具网
http://www.ntp.org.cn/
https://www.hko.gov.hk/tc/nts/ntime.htm
http://time.ewha.or.kr/domestic.html
日本標準時(JST)グループ
https://www.id-ntp.com/
https://www.nist.gov/pml/time-and-frequency-division/time-distribution/internet-time-service-its
https://developers.google.com/time/
NTP: Building a more accurate time service at Facebook scale
Network Time Protocol (NTP) - National Research Council Canada
Deutsche NTP Zeitserver
Timeservice
Time Dissemination Service via NTP
NTP (Network Time Protocol) | INRIM
https://time.nl/
http://www.sth1.ntp.se/
Time, with focus on NTP and Slovenia
https://ntp.teambelgium.net/
Zegar - Główny Urząd Miar
NTP SERVERS — NTP серверы точного времени
https://ntp.br/
http://www.time.org.za/