Known Servers (常见服务器)
Known NTP Servers (常见 NTP 服务器)
210.72.145.44 # 中科院国家授时中心
stdtime.gov.hk
ac-ntp0.net.cmu.edu
ntp.nict.jp
clock.isc.org
time.nrc.ca
Known Cache Nameservers (常见 DNS 缓存服务器)
# China Netcom
202.99.96.68
202.99.104.68
202.96.75.68
# China Telecom
219.150.32.132
202.97.224.69
# Nankai Univ.
202.113.16.10
202.113.16.11
202.98.0.68
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