Domestic commonly used NTP server address and IP

210.72.145.44 (IP address of National Time Service Center server)
133.100.11.8 Fukuoka University
time-a.nist.gov 129.6.15.28 NIST, Gaithersburg, Maryland
time-b.nist.gov 129.6.15.29 NIST, Gaithersburg, Maryland
time-a .timefreq.bldrdoc.gov 132.163.4.101 NIST, Boulder, Colorado
time-b.timefreq.bldrdoc.gov 132.163.4.102 NIST, Boulder, Colorado
time-c.timefreq.bldrdoc.gov 132.163.4.103 NIST, Boulder, Colorado
utcnist. colorado.edu 128.138.140.44 University of Colorado, Boulder
time.nist.gov 192.43.244.18 NCAR, Boulder, Colorado
time-nw.nist.gov 131.107.1.10 Microsoft, Redmond, Washington
nist1.symmetricom.com 69.25.96.13 Symmetricom, San Jose, California
nist1-dc.glassey.com 216.200.93.8 Abovenet, Virginia
nist1-ny.glassey.com 208.184.49.9 Abovenet, New York City
nist1-sj.glassey.com 207.126.98.204 Abovenet, San Jose, California
nist1.aol-ca.truetime.com 207.200.81.113 TrueTime, AOL facility, Sunnyvale, California
nist1.aol-va.truetime.com 64.236.96.53 TrueTime, AOL facility, Virginia
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ntp.sjtu.edu.cn 202.120.2.101 (Shanghai Jiaotong University Network Center NTP server address)
s1a.time.edu.cn Beijing University of Posts and Telecommunications
s1b.time.edu.cn Tsinghua University
s1c.time.edu. cn Peking University
s1d.time.edu.cn Southeast University
s1e.time.edu.cn Tsinghua University
s2a.time.edu.cn Tsinghua University
s2b.time.edu.cn Tsinghua University
s2c.time.edu.cn Beijing University of Posts and Telecommunications
s2d .time.edu.cn Southwest Regional Network Center
s2e.time.edu.cn Northwest Regional Network Center
s2f.time.edu.cn Northeast Regional Network Center
s2g.time.edu.cn Southeast China Network Center
s2h.time.edu.cn Sichuan University Network Management Center
s2j.time.edu.cn Dalian University of Technology Network Center
s2k.time.edu.cn CERNET Guilin master node
s2m.time .edu.cn Peking University