For debugging only
This list is intended to help troubleshoot DNS issues. Do not configure these servers as your DNS resolver unless you know and trust the operator. A DNS resolver can log the domains you look up and can manipulate or block DNS responses.
Instead, use your ISP's default DNS server, or a global DNS server operated by an organisation you trust.
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137.220.144.199Checked 3 hours ago
CTG Server Limited
AS152194
Tokyo
35.6895, 139.6917
100% uptime
|240msMedian ping from Nuremberg, Germany|4msJitter (1 standard deviation)251msQuery time (median DNS query time - median ping) -
137.220.199.174Checked 2 hours ago
CTG Server Limited
AS152194
Tokyo
35.6895, 139.6917
100% uptime
|239msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)252msQuery time (median DNS query time - median ping) -
139.162.98.58Checked 6 hours ago
Akamai Connected Cloud
AS63949
Tokyo
35.6895, 139.6917
98% uptime
|244msMedian ping from Nuremberg, Germany|3msJitter (1 standard deviation)250msQuery time (median DNS query time - median ping) -
148.109.52.22Checked 1 hour ago
COLT Technology Services Group Limited
AS8220
Tokyo
35.6895, 139.6917
100% uptime
|224msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)11msQuery time (median DNS query time - median ping) -
150.99.178.34Checked 2 hours ago
Research Organization of Information and Systems, National Institute of Informatics
AS2907
Tokyo
35.6895, 139.6917
100% uptime
|257msMedian ping from Nuremberg, Germany|4msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
150.99.178.42Checked 2 hours ago
Research Organization of Information and Systems, National Institute of Informatics
AS2907
Tokyo
35.6895, 139.6917
100% uptime
|255msMedian ping from Nuremberg, Germany|4msJitter (1 standard deviation)129msQuery time (median DNS query time - median ping) -
151.248.68.220Checked 7 hours ago
Datacamp Limited
AS212238
Tokyo
35.6895, 139.6917
99% uptime
|264msMedian ping from Nuremberg, Germany|8msJitter (1 standard deviation)289msQuery time (median DNS query time - median ping) -
152.165.119.232Checked 4 hours ago
Sony Network Communications Inc.
AS2527
Tokyo
35.6895, 139.6917
98% uptime
|270msMedian ping from Nuremberg, Germany|32msJitter (1 standard deviation)270msQuery time (median DNS query time - median ping) -
153.124.133.151Checked 1 hour ago
GMO GlobalSign Holdings K.K.
AS131921
Tokyo
35.6895, 139.6917
100% uptime
|273msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)249msQuery time (median DNS query time - median ping) -
153.124.133.250Checked 7 minutes ago
GMO GlobalSign Holdings K.K.
AS131921
Tokyo
35.6895, 139.6917
100% uptime
|236msMedian ping from Nuremberg, Germany|17msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
153.126.206.241Checked 5 hours ago
SAKURA Internet Inc.
AS7684
Tokyo
35.6895, 139.6917
98% uptime
|271msMedian ping from Nuremberg, Germany|10msJitter (1 standard deviation)534msQuery time (median DNS query time - median ping) -
153.127.13.125Checked 1 hour ago
SAKURA Internet Inc.
AS7684
Tokyo
35.6895, 139.6917
97% uptime
|275msMedian ping from Nuremberg, Germany|9msJitter (1 standard deviation)528msQuery time (median DNS query time - median ping) -
157.65.191.33Checked 1 hour ago
NTT PC Communications, Inc.
AS2514
Tokyo
35.6895, 139.6917
97% uptime
|270msMedian ping from Nuremberg, Germany|10msJitter (1 standard deviation)325msQuery time (median DNS query time - median ping) -
160.16.72.251Checked 2 hours ago
SAKURA Internet Inc.
AS9370
Tokyo
35.6895, 139.6917
97% uptime
|262msMedian ping from Nuremberg, Germany|10msJitter (1 standard deviation)343msQuery time (median DNS query time - median ping) -
160.16.83.102Checked 4 hours ago
SAKURA Internet Inc.
AS9370
Tokyo
35.6895, 139.6917
100% uptime
|262msMedian ping from Nuremberg, Germany|9msJitter (1 standard deviation)11msQuery time (median DNS query time - median ping) -
160.16.132.67Checked 6 hours ago
SAKURA Internet Inc.
AS9370
Tokyo
35.6895, 139.6917
98% uptime
|255msMedian ping from Nuremberg, Germany|11msJitter (1 standard deviation)253msQuery time (median DNS query time - median ping) -
160.16.243.227Checked 6 hours ago
SAKURA Internet Inc.
AS9370
Tokyo
35.6895, 139.6917
98% uptime
|260msMedian ping from Nuremberg, Germany|11msJitter (1 standard deviation)8msQuery time (median DNS query time - median ping) -
160.187.29.33Checked 55 minutes ago
THX Corp.
AS152868
Tokyo
35.6895, 139.6917
99% uptime
|300msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)315msQuery time (median DNS query time - median ping) -
160.187.29.34Checked 4 hours ago
THX Corp.
AS152868
Tokyo
35.6895, 139.6917
100% uptime
|298msMedian ping from Nuremberg, Germany|4msJitter (1 standard deviation)325msQuery time (median DNS query time - median ping) -
160.251.81.17Checked 15 minutes ago
GMO Internet, Inc.
AS7506
Tokyo
35.6895, 139.6917
100% uptime
|255msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)74msQuery time (median DNS query time - median ping) -
161.248.63.63Checked 2 hours ago
Alice Network
AS215355
Tokyo
35.6895, 139.6917
100% uptime
|219msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)166msQuery time (median DNS query time - median ping) -
163.43.220.212Checked 3 hours ago
SAKURA Internet Inc.
AS9370
Tokyo
35.6895, 139.6917
98% uptime
|260msMedian ping from Nuremberg, Germany|9msJitter (1 standard deviation)11msQuery time (median DNS query time - median ping) -
164.52.24.66Checked 7 hours ago
CDS Global Cloud Co., Ltd
AS63199
Tokyo
35.6895, 139.6917
100% uptime
|248msMedian ping from Nuremberg, Germany|13msJitter (1 standard deviation)38msQuery time (median DNS query time - median ping) -
172.104.88.10Checked 3 hours ago
Akamai Connected Cloud
AS63949
Tokyo
35.6895, 139.6917
98% uptime
|252msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)29msQuery time (median DNS query time - median ping) -
172.207.76.174Checked 7 hours ago
Microsoft Corporation
AS8075
Tokyo
35.6895, 139.6917
100% uptime
|224msMedian ping from Nuremberg, Germany|3msJitter (1 standard deviation)247msQuery time (median DNS query time - median ping) -
172.237.20.186Checked 2 hours ago
Akamai Connected Cloud
AS63949
Tokyo
35.6895, 139.6917
96% uptime
|247msMedian ping from Nuremberg, Germany|6msJitter (1 standard deviation)221msQuery time (median DNS query time - median ping) -
176.126.114.216Checked 6 hours ago
xTom Japan Corporation
AS3258
Tokyo
35.6895, 139.6917
100% uptime
|241msMedian ping from Nuremberg, Germany|8msJitter (1 standard deviation)262msQuery time (median DNS query time - median ping) -
177.0.142.223Checked 2 hours ago
Prime Security Corp.
AS400618
Tokyo
35.6895, 139.6917
100% uptime
|233msMedian ping from Nuremberg, Germany|6msJitter (1 standard deviation)262msQuery time (median DNS query time - median ping) -
185.184.223.7Checked 5 hours ago
xTom Japan Corporation
AS3258
Tokyo
35.6895, 139.6917
100% uptime
|255msMedian ping from Nuremberg, Germany|4msJitter (1 standard deviation)30msQuery time (median DNS query time - median ping) -
202.221.60.88Checked 3 hours ago
Internet Initiative Japan Inc.
AS2497
Tokyo
35.6895, 139.6917
98% uptime
|277msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)317msQuery time (median DNS query time - median ping) -
202.234.16.133Checked 4 hours ago
IDC Frontier Inc.
AS4694
Tokyo
35.6895, 139.6917
100% uptime
|275msMedian ping from Nuremberg, Germany|6msJitter (1 standard deviation)275msQuery time (median DNS query time - median ping) -
207.56.227.202Checked 4 hours ago
JT TELECOM INTERNATIONAL PTE.LTD.
AS137535
Tokyo
35.6895, 139.6917
100% uptime
|237msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)53msQuery time (median DNS query time - median ping) -
210.254.181.158Checked 2 hours ago
NTT DOCOMO BUSINESS,Inc.
AS4713
Tokyo
35.6895, 139.6917
100% uptime
|256msMedian ping from Nuremberg, Germany|6msJitter (1 standard deviation)534msQuery time (median DNS query time - median ping) -
218.45.195.155Checked 5 hours ago
its communications Inc.
AS9365
Tokyo
35.6895, 139.6917
98% uptime
|270msMedian ping from Nuremberg, Germany|23msJitter (1 standard deviation)566msQuery time (median DNS query time - median ping) -
219.99.143.222Checked 4 hours ago
AT TOKYO Corporation
AS9999
Tokyo
35.6895, 139.6917
100% uptime
|237msMedian ping from Nuremberg, Germany|8msJitter (1 standard deviation)274msQuery time (median DNS query time - median ping) -
221.242.7.76Checked 7 hours ago
ARTERIA Networks Corporation
AS17506
Tokyo
35.6895, 139.6917
100% uptime
|276msMedian ping from Nuremberg, Germany|9msJitter (1 standard deviation)291msQuery time (median DNS query time - median ping) -
223.26.15.1Checked 8 hours ago
Skycloud Computing co., Ltd.
AS7483
Tokyo
35.6895, 139.6917
100% uptime
|245msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)264msQuery time (median DNS query time - median ping) -
223.26.15.2Checked 6 hours ago
Skycloud Computing co., Ltd.
AS7483
Tokyo
35.6895, 139.6917
100% uptime
|246msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)264msQuery time (median DNS query time - median ping) -
165.101.8.2Checked 1 hour ago
Incorporated Educational Institution Kaichigakuen
AS152870
Tsukubamirai
35.9841, 140.0093
97% uptime
|234msMedian ping from Nuremberg, Germany|9msJitter (1 standard deviation)76msQuery time (median DNS query time - median ping) -
157.76.40.5Checked 51 minutes ago
Research Organization of Information and Systems, National Institute of Informatics
AS2907
Ube
33.9431, 131.2511
100% uptime
|270msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)159msQuery time (median DNS query time - median ping) -
61.194.100.137Checked 1 hour ago
NTT PC Communications, Inc.
AS2514
Yamato
35.4728, 139.4510
99% uptime
|254msMedian ping from Nuremberg, Germany|5msJitter (1 standard deviation)273msQuery time (median DNS query time - median ping) -
133.114.71.239Checked 1 hour ago
Sony Network Communications Inc.
AS2527
Yamato
35.4728, 139.4510
99% uptime
|278msMedian ping from Nuremberg, Germany|3msJitter (1 standard deviation)301msQuery time (median DNS query time - median ping)