我收集的国外time server的名单，欢迎测试使用。
Active Servers
AR time.sinectis.com.ar (216.244.192.3)
AR tick.nap.com.ar (200.49.40.1)
AR tock.nap.com.ar (200.49.40.15)
AU ntp.saard.net (203.21.37.18)
BE ntp1.belbone.be (195.13.23.5)
BE ntp2.belbone.be (195.13.1.153)
BR ntp.cais.rnp.br (200.144.121.33)
BR ntp.hiway.com.br (200.246.53.5)
BR ntp.pop-pr.rnp.br (200.19.74.21)
BR ntp.ufes.br (200.137.65.132)
BR ntp1.pucpr.br (200.192.112.8)
CA ntp.cpsc.ucalgary.ca (136.159.2.1)
CA tick.utoronto.ca (128.100.103.252)
CA timelord.uregina.ca (142.3.100.15)
CZ ntp.globe.cz (81.95.96.3)
CZ ntp.karpo.cz (217.11.227.68)
CZ ntp1.contactel.cz (212.65.193.3)
CZ ntp2.contactel.cz (212.65.193.4)
DK clock.netcetera.dk (130.228.230.2)
GR ntp.mikroskosmos.com (213.5.174.2)
DK clock2.netcetera.dk (194.192.207.9)
ES slug.ctv.es [194.179.52.14]
)
FI tick.keso.fi (194.137.39.67)
FI tock.keso.fi (194.137.39.68)
FR ntp.ndsoftwarenet.com
FR ntp.obspm.fr
FR ntp.tuxfamily.net
FR ntp1.tuxfamily.net (80.67.177.2)
FR ntp2.tuxfamily.net (80.67.179.2)
FR ntp.univ-lyon1.fr (134.214.100.6)
FR ntp.via.ecp.fr (138.195.130.71)
HR zg1.ntp.carnet.hr (161.53.2.70)
HR zg2.ntp.carnet.hr (161.53.123.4)
HR st.ntp.carnet.hr (161.53.30.3)
HR ri.ntp.carnet.hr (161.53.40.3)
HR os.ntp.carnet.hr (161.53.200.8)
HU time.kfki.hu (148.6.0.1)
ID ntp.incaf.net (202.180.0.71)
IT ntps.net4u.it (80.83.192.129)
JP ntp.cyber-fleet.net
KR ntp.ewha.net [211.39.143.103]
KR time.nuri.net[203.255.112.4]
MX ntp2a.audiotel.com.mx (200.34.146.67)
MX ntp2b.audiotel.com.mx (200.34.146.68)
MX ntp2c.audiotel.com.mx (200.34.146.69)
MY ntp.doubleukay.com
NG ntp.supernet300.com (216.72.109.4)
NL ntp1.theinternetone.net (62.4.94.221)
NL ntp2.theinternetone.net (62.4.94.8)
NL ntp3.theinternetone.net (62.4.94.210)
NO fartein.ifi.uio.no (129.240.64.3)
NZ ntp.iprolink.co.nz (use DNS)
NZ ntp.massey.ac.nz (130.123.128.253)
NZ ntp.public.otago.ac.nz (139.80.64.114)
NZ tk1.ihug.co.nz, tk2.ihug.co.nz, tk3.ihug.co.nz (use DNS)
PL info.cyf-kr.edu.pl: 149.156.4.11
PT bug.fe.up.pt (193.136.54.1)
RO ntp.ip.ro (212.93.129.107)
RU ntp.psn.ru (194.149.67.130)
RU sign.chg.ru (193.233.46.10)
SE ntp.lth.se (130.235.20.3)
SG ntp.shim.org
SI biofiz.mf.uni-lj.si (193.2.69.10)
SI ntp1.arnes.si (193.2.1.66)
SI ntp2.arnes.si (193.2.1.92)
SI time.ijs.si (193.2.4.6)
SV clock.cimat.ues.edu.sv (168.243.7.66)
UA ntp.terabyte.com.ua (195.66.196.173)
UK bear.zoo.bt.co.uk (132.146.236.132)
UK ntp.cis.strath.ac.uk
UK ntp.exnet.com (194.207.34.9)
UK ntp2a.mcc.ac.uk (130.88.202.49)
UK ntp2b.mcc.ac.uk (130.88.200.98)
UK ntp2c.mcc.ac.uk (130.88.200.4)
UK ntp2d.mcc.ac.uk (130.88.203.12)
UK ntp{0|1|2}.sandvika.net (194.164.127.{4|5|6})
UK ntp0.uk.uu.net 158.43.128.33
UK ntp1.uk.uu.net 158.43.128.66
UK ntp2.uk.uu.net 158.43.192.66
UK tick.tanac.net (195.112.34.51)
UK time-server.ndo.com (195.7.224.135)
US AR sushi.compsci.lyon.edu (150.208.72.154)
US AZ decimal.lib.ci.phoenix.az.us (148.167.132.201)
US AZ dewey.lib.ci.phoenix.az.us (148.167.132.200)
US AZ ntp.drydog.com (207.211.160.111)
US CA clock.fmt.he.net (216.218.192.202)
US CA clock.sjc.he.net (216.218.254.202)
US CA ntp.ucsd.edu (132.239.254.49)
US CA ntp1.mainecoon.com (63.192.96.2)
US CA ntp2.mainecoon.com (63.192.96.3)
US CA ntp1.sf-bay.org (207.126.97.57)
US CA ntp2.sf-bay.org (204.74.68.55)
US CA reloj.kjsl.com (204.87.183.6)
US CA time.berkeley.netdot.net (216.27.190.202)
US CA time.five-ten-sg.com (205.147.40.34)
US CO ntp1.tummy.com
US DE louie.udel.edu (128.4.40.12)
US GA ntp.shorty.com (208.21.108.186)
US GA rolex.usg.edu
US GA timex.usg.edu
US IL chrivh40.cch.com (198.147.37.140)
US IL ntp-0.cso.uiuc.edu (130.126.24.53)
US IL ntp-1.cso.uiuc.edu (130.126.24.24)
US IL ntp-1.mcs.anl.gov (140.221.9.20)
US IL ntp-2.cso.uiuc.edu (130.126.24.44)
US IL ntp-2.mcs.anl.gov (140.221.9.6)
US IN gilbreth.ecn.purdue.edu (128.46.129.93, 128.46.141.93, 128.46.147.93, 128.46.148.93, 128.46.171.93)
US IN harbor.ecn.purdue.edu (128.46.128.76, 128.46.129.76, 128.46.154.76)
US IN horologe.cerias.purdue.edu(128.10.252.1)
US IN tick.cerias.purdue.edu(128.10.252.9), tock.cerias.purdue.edu(128.10.252.10)
US KS ntp1.kansas.net (199.240.130.1)
US KS ntp2.kansas.net (199.240.130.12)
US MA ntp.ourconcord.net (216.204.156.2)
US MN ns.nts.umn.edu (128.101.101.101)
US MN nss.nts.umn.edu (134.84.84.84)
US MO time-ext.missouri.edu (NO IP LISTED)
US MT chronos1.umt.edu (192.73.48.1)
US MT chronos2.umt.edu (192.73.48.2)
US MT chronos3.umt.edu (192.73.48.6)
US NC clock1.unc.edu (152.2.21.1)
US NJ tick.jrc.us (65.211.109.1)
US NJ tock.jrc.us (65.211.109.11)
US NV cuckoo.nevada.edu (131.216.1.101)
US NV tick.cs.unlv.edu (131.216.22.15)
US NV tock.cs.unlv.edu (131.216.22.17)
US NY clock.linuxshell.net (64.243.118.2)
US NY clock.nyc.he.net (209.51.161.238)
US NY ntp0.cornell.edu
US NY sundial.columbia.edu (128.59.59.177)
US NY timex.cs.columbia.edu (128.59.16.20)
US PA clock-1.cs.cmu.edu (128.2.250.95)
US PA clock-2.cs.cmu.edu (128.2.222.8)
US PA clock.psu.edu (128.118.25.3)
US PA fuzz.psc.edu (128.182.58.100)
US PA ntp-1.ece.cmu.edu (no address, please use DNS)
US PA ntp-2.ece.cmu.edu (no address, please use DNS)
US TX ntp.cox.smu.edu (129.119.80.126)
US TX ntp.fnbhs.com (209.144.20.76)
US TX ntp.tmc.edu (128.249.1.10)
US TX ntppub.tamu.edu (no address available)
US TX tick.greyware.com (207.55.146.19)
US TX tock.greyware.com (207.55.146.54)
US VA ntp-1.vt.edu (198.82.162.213)
US VA ntp-2.vt.edu (198.82.161.227)
US VA ntp.cmr.gov (140.162.8.3)
US VT ntp0.state.vt.us (159.105.23.194)
US VT ntp1.state.vt.us (159.105.23.130)
US VT ntp2.state.vt.us (170.222.64.130)
US WI ntp1.cs.wisc.edu (128.105.39.11)
US WI ntp3.cs.wisc.edu (128.105.37.11)
US WI ntp3.sf-bay.org (207.126.97.57)
VE ntp.linux.org.ve (150.188.8.196)
ZA ntp.cs.unp.ac.za (143.128.82.200)
ZA tock.nml.csir.co.za (146.64.241.229)
AU ntp.ise.canberra.edu.au (137.92.140.80)
AU ntp0.cs.mu.OZ.AU (128.250.36.2)
AU ntp1.cs