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.
-
77.242.94.130Checked 5 hours ago
O2 Czech Republic, a.s.
AS41046
Přerov
49.4551, 17.4509
100% uptime
|16msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)80msQuery time (median DNS query time - median ping) -
217.197.151.178Checked 5 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Přerov
49.4551, 17.4509
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
217.197.151.180Checked 6 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Přerov
49.4551, 17.4509
100% uptime
|14msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)42msQuery time (median DNS query time - median ping) -
217.197.151.186Checked 6 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Přerov
49.4551, 17.4509
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)42msQuery time (median DNS query time - median ping) -
217.197.151.188Checked 6 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Přerov
49.4551, 17.4509
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
217.197.151.189Checked 4 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Přerov
49.4551, 17.4509
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)42msQuery time (median DNS query time - median ping) -
193.179.11.102Checked 4 hours ago
T-Mobile Czech Republic a.s.
AS13036
Příbor
49.6409, 18.1450
97% uptime
|14msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)102msQuery time (median DNS query time - median ping) -
80.188.10.50Checked 5 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
93% uptime
|15msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)70msQuery time (median DNS query time - median ping) -
80.188.80.98Checked 3 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
100% uptime
|9msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)52msQuery time (median DNS query time - median ping) -
80.188.118.250Checked 10 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
97% uptime
|12msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)66msQuery time (median DNS query time - median ping) -
90.182.220.40Checked 6 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
100% uptime
|8msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)21msQuery time (median DNS query time - median ping) -
90.183.19.250Checked 5 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
217.197.151.179Checked 5 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prosenice
49.4918, 17.4849
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
217.197.151.181Checked 6 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prosenice
49.4918, 17.4849
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
217.197.151.184Checked 5 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prosenice
49.4918, 17.4849
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
217.197.151.190Checked 5 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prosenice
49.4918, 17.4849
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)42msQuery time (median DNS query time - median ping) -
46.33.113.22Checked 3 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
92% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)84msQuery time (median DNS query time - median ping) -
85.163.181.45Checked 3 hours ago
CETIN a.s.
AS28725
Prostějov
49.4719, 17.1118
100% uptime
|16msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)101msQuery time (median DNS query time - median ping) -
31.47.96.41Checked 2 hours ago
FreeTel, s.r.o.
AS8251
Prostřední Bečva
49.4361, 18.2520
100% uptime
|16msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)63msQuery time (median DNS query time - median ping) -
5.181.94.176Checked 2 hours ago
UVT Internet s.r.o.
AS50825
Pyšely
49.8768, 14.6771
100% uptime
|14msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)104msQuery time (median DNS query time - median ping) -
78.156.33.107Checked 8 hours ago
RETE internet, s.r.o.
AS43507
Roudnice nad Labem
50.4253, 14.2617
97% uptime
|14msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)37msQuery time (median DNS query time - median ping) -
78.156.39.3Checked 2 hours ago
RETE internet, s.r.o.
AS43507
Roudnice nad Labem
50.4253, 14.2617
100% uptime
|14msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)60msQuery time (median DNS query time - median ping) -
78.156.39.5Checked 2 hours ago
RETE internet, s.r.o.
AS43507
Roudnice nad Labem
50.4253, 14.2617
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
185.215.20.115Checked 10 hours ago
Windyghoul s.r.o.
AS205535
Sedlčany
49.6606, 14.4266
93% uptime
|17msMedian ping from Nuremberg, Germany|9msJitter (1 standard deviation)109msQuery time (median DNS query time - median ping) -
195.191.202.2Checked 4 hours ago
BEZVANET s.r.o.
AS196952
Skřivany
50.2685, 15.4992
97% uptime
|15msMedian ping from Nuremberg, Germany|38msJitter (1 standard deviation)20msQuery time (median DNS query time - median ping) -
195.191.202.3Checked 1 hour ago
BEZVANET s.r.o.
AS196952
Skřivany
50.2685, 15.4992
97% uptime
|15msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)19msQuery time (median DNS query time - median ping) -
78.156.48.9Checked 2 hours ago
RETE internet, s.r.o.
AS43507
Sokolov
50.1813, 12.6401
100% uptime
|27msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)126msQuery time (median DNS query time - median ping) -
185.22.237.110Checked 6 hours ago
FIXNET s.r.o.
AS197046
Sopřeč
50.0936, 15.5567
100% uptime
|19msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)64msQuery time (median DNS query time - median ping) -
45.139.88.10Checked 7 hours ago
United Networks SE
AS197296
Staňkov
49.5535, 13.0698
100% uptime
|15msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
86.49.161.165Checked 6 hours ago
Vodafone Czech Republic a.s.
AS16019
Staré Město
49.0752, 17.4334
97% uptime
|11msMedian ping from Nuremberg, Germany|3msJitter (1 standard deviation)94msQuery time (median DNS query time - median ping) -
77.48.29.6Checked 6 hours ago
Vodafone Czech Republic a.s.
AS16019
Stodůlky
50.0500, 14.3167
100% uptime
|7msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)61msQuery time (median DNS query time - median ping) -
188.116.70.178Checked 11 hours ago
SELECT SYSTEM, s.r.o.
AS196822
Šumperk
49.9653, 16.9706
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)44msQuery time (median DNS query time - median ping) -
81.200.58.162Checked 3 hours ago
O2 Czech Republic, a.s.
AS41046
Tábor
49.4144, 14.6578
92% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)83msQuery time (median DNS query time - median ping) -
185.151.174.67Checked 45 minutes ago
CEZNET s.r.o.
AS204064
Tachov
49.7953, 12.6336
100% uptime
|15msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)46msQuery time (median DNS query time - median ping) -
77.48.24.142Checked 8 hours ago
Vodafone Czech Republic a.s.
AS16019
Teplice
50.6404, 13.8245
97% uptime
|14msMedian ping from Nuremberg, Germany|3msJitter (1 standard deviation)122msQuery time (median DNS query time - median ping) -
78.157.163.78Checked 2 hours ago
SilesNet s.r.o.
AS43709
Třinec
49.6776, 18.6708
100% uptime
|15msMedian ping from Nuremberg, Germany|2msJitter (1 standard deviation)116msQuery time (median DNS query time - median ping) -
81.90.248.94Checked 21 minutes ago
ABAK, Co.Ltd.
AS39761
Újezd nad Lesy
50.0765, 14.6595
97% uptime
|11msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)41msQuery time (median DNS query time - median ping) -
82.144.143.122Checked 1 hour ago
Kabelova televize Usti nad Orlici, spol. s r. o.
AS51449
Ústí nad Orlicí
49.9739, 16.3936
92% uptime
|11msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)57msQuery time (median DNS query time - median ping) -
213.235.100.221Checked 4 hours ago
CEZNET s.r.o.
AS6740
Valašské Meziříčí
49.4718, 17.9711
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
62.141.8.228Checked 6 hours ago
T-Mobile Czech Republic a.s.
AS13036
Velké Poříčí
50.4618, 16.1893
97% uptime
|16msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)85msQuery time (median DNS query time - median ping) -
91.184.249.63Checked 5 hours ago
SmartApe OU
AS62212
Veselí nad Lužnicí
49.1843, 14.6973
100% uptime
|11msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)39msQuery time (median DNS query time - median ping) -
85.137.167.126Checked 2 hours ago
SmartApe OU
AS62212
Veselí nad Moravou
48.9536, 17.3765
100% uptime
|11msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
178.208.89.130Checked 8 hours ago
Iron Hosting Centre LTD
AS216139
Veselí nad Moravou
48.9536, 17.3765
100% uptime
|11msMedian ping from Nuremberg, Germany|2msJitter (1 standard deviation)29msQuery time (median DNS query time - median ping) -
62.204.238.134Checked 9 hours ago
TTNET s.r.o.
AS34040
Voděrady
50.2087, 16.1531
97% uptime
|9msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)58msQuery time (median DNS query time - median ping) -
46.255.8.2Checked 2 hours ago
ISP Alliance a.s.
AS52084
Vrchlabí
50.6270, 15.6094
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)66msQuery time (median DNS query time - median ping) -
46.255.8.3Checked 3 hours ago
ISP Alliance a.s.
AS52084
Vrchlabí
50.6270, 15.6094
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)76msQuery time (median DNS query time - median ping) -
46.16.121.128Checked 24 minutes ago
MaRcom-Eko s.r.o.
AS44430
Všechlapy
50.2211, 15.0284
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)67msQuery time (median DNS query time - median ping) -
46.33.100.163Checked 3 hours ago
Quantcom, a.s.
AS29208
Vyškov
49.2775, 16.9990
100% uptime
|15msMedian ping from Nuremberg, Germany|39msJitter (1 standard deviation)45msQuery time (median DNS query time - median ping) -
46.33.101.147Checked 3 hours ago
Quantcom, a.s.
AS29208
Vyškov
49.2775, 16.9990
92% uptime
|15msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)81msQuery time (median DNS query time - median ping) -
176.53.191.145Checked 10 hours ago
Brnonet.eu
AS209834
Žabčice
49.0116, 16.6026
100% uptime
|10msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)46msQuery time (median DNS query time - median ping) -
95.82.166.253Checked 6 hours ago
NETBOX Autonomous system
AS31246
Ždánice
49.0673, 17.0275
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
85.163.64.58Checked 5 hours ago
CETIN a.s.
AS28725
Želetice
49.0142, 17.0081
93% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)86msQuery time (median DNS query time - median ping) -
82.202.6.94Checked 7 hours ago
CEZNET s.r.o.
AS6740
Zlín
49.2264, 17.6706
93% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)76msQuery time (median DNS query time - median ping) -
131.117.211.167Checked 7 hours ago
AVONET, s.r.o.
AS20723
Zlín
49.2264, 17.6706
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)46msQuery time (median DNS query time - median ping) -
131.117.211.201Checked 35 minutes ago
AVONET, s.r.o.
AS20723
Zlín
49.2264, 17.6706
97% uptime
|15msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)74msQuery time (median DNS query time - median ping) -
217.112.170.138Checked 7 hours ago
AVONET, s.r.o.
AS20723
Zlín
49.2264, 17.6706
93% uptime
|17msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)157msQuery time (median DNS query time - median ping) -
217.115.244.130Checked 7 hours ago
AVONET, s.r.o.
AS20723
Zlín
49.2264, 17.6706
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)73msQuery time (median DNS query time - median ping) -
178.17.3.49Checked 10 hours ago
UVT Internet s.r.o.
AS50825
Zvole
49.9347, 14.4177
100% uptime
|18msMedian ping from Nuremberg, Germany|2msJitter (1 standard deviation)101msQuery time (median DNS query time - median ping)