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.
-
185.113.29.40Checked 4 hours ago
AdGuard Software Limited
AS212772
Prague
50.0880, 14.4208
100% uptime
|12msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)43msQuery time (median DNS query time - median ping) -
185.113.29.52Checked 2 hours ago
AdGuard Software Limited
AS212772
Prague
50.0880, 14.4208
100% uptime
|10msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)44msQuery time (median DNS query time - median ping) -
185.113.29.181Checked 47 minutes ago
AdGuard Software Limited
AS212772
Prague
50.0880, 14.4208
98% uptime
|10msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)44msQuery time (median DNS query time - median ping) -
185.156.121.18Checked 7 hours ago
Pranet s.r.o.
AS202719
Prague
50.0880, 14.4208
99% uptime
|21msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)34msQuery time (median DNS query time - median ping) -
185.156.123.113Checked 5 hours ago
Pranet s.r.o.
AS202719
Prague
50.0880, 14.4208
94% uptime
|23msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)90msQuery time (median DNS query time - median ping) -
185.175.84.157Checked 2 hours ago
Fortion Networks, s.r.o.
AS44984
Prague
50.0880, 14.4208
99% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)22msQuery time (median DNS query time - median ping) -
185.201.12.74Checked 2 hours ago
CEZNET s.r.o.
AS204064
Prague
50.0880, 14.4208
100% uptime
|15msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)34msQuery time (median DNS query time - median ping) -
193.17.47.1Checked 4 hours ago
CZ.NIC, z.s.p.o.
AS20701
Prague
50.0880, 14.4208
100% uptime
|16msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)51msQuery time (median DNS query time - median ping) -
193.85.216.165Checked 5 hours ago
T-Mobile Czech Republic a.s.
AS13036
Prague
50.0880, 14.4208
100% uptime
|34msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)98msQuery time (median DNS query time - median ping) -
193.86.49.12Checked 3 hours ago
T-Mobile Czech Republic a.s.
AS13036
Prague
50.0880, 14.4208
88% uptime
|44msMedian ping from Nuremberg, Germany|35msJitter (1 standard deviation)127msQuery time (median DNS query time - median ping) -
193.162.47.55Checked 1 hour ago
GREEN FLOID LLC
AS204957
Prague
50.0880, 14.4208
98% uptime
|12msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)31msQuery time (median DNS query time - median ping) -
193.165.122.230Checked 4 hours ago
PODA a.s.
AS30764
Prague
50.0880, 14.4208
100% uptime
|16msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)122msQuery time (median DNS query time - median ping) -
193.165.130.46Checked 4 hours ago
PODA a.s.
AS30764
Prague
50.0880, 14.4208
88% uptime
|16msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)62msQuery time (median DNS query time - median ping) -
193.165.186.226Checked 3 hours ago
PODA a.s.
AS30764
Prague
50.0880, 14.4208
100% uptime
|17msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)95msQuery time (median DNS query time - median ping) -
193.179.48.117Checked 6 hours ago
T-Mobile Czech Republic a.s.
AS13036
Prague
50.0880, 14.4208
100% uptime
|21msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)62msQuery time (median DNS query time - median ping) -
194.228.92.174Checked 2 hours ago
O2 Czech Republic, a.s.
AS5610
Prague
50.0880, 14.4208
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)27msQuery time (median DNS query time - median ping) -
194.228.92.190Checked 7 hours ago
O2 Czech Republic, a.s.
AS5610
Prague
50.0880, 14.4208
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)25msQuery time (median DNS query time - median ping) -
194.228.92.206Checked 7 hours ago
O2 Czech Republic, a.s.
AS5610
Prague
50.0880, 14.4208
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)24msQuery time (median DNS query time - median ping) -
195.123.246.163Checked 4 hours ago
GREEN FLOID LLC
AS204957
Prague
50.0880, 14.4208
100% uptime
|11msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)26msQuery time (median DNS query time - median ping) -
195.123.246.224Checked 5 hours ago
GREEN FLOID LLC
AS204957
Prague
50.0880, 14.4208
100% uptime
|13msMedian ping from Nuremberg, Germany|10msJitter (1 standard deviation)32msQuery time (median DNS query time - median ping) -
213.168.179.78Checked 6 hours ago
Dragon Internet a.s.
AS15614
Prague
50.0880, 14.4208
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)55msQuery time (median DNS query time - median ping) -
217.197.151.178Checked 1 hour ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
217.197.151.180Checked 56 minutes ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|19msMedian ping from Nuremberg, Germany|2msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
217.197.151.181Checked 2 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
217.197.151.182Checked 1 hour ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|20msMedian ping from Nuremberg, Germany|8msJitter (1 standard deviation)46msQuery time (median DNS query time - median ping) -
217.197.151.185Checked 4 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
217.197.151.186Checked 1 hour ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
217.197.151.188Checked 4 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)48msQuery time (median DNS query time - median ping) -
217.197.151.189Checked 5 hours ago
ORIGINAL AS CZ-NORDICTELECOMREGIONAL
AS42908
Prague
50.0880, 14.4208
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)52msQuery time (median DNS query time - median ping) -
37.221.248.205Checked 6 hours ago
Jiri Tlapak
AS204666
Přelouč
50.0399, 15.5603
100% uptime
|14msMedian ping from Nuremberg, Germany|2msJitter (1 standard deviation)520msQuery time (median DNS query time - median ping) -
90.182.159.131Checked 2 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
100% uptime
|19msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)57msQuery time (median DNS query time - median ping) -
90.182.220.40Checked 3 hours ago
O2 Czech Republic, a.s.
AS5610
Příbram
49.6899, 14.0104
100% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)23msQuery time (median DNS query time - median ping) -
176.98.97.37Checked 6 hours ago
O2 Czech Republic, a.s.
AS16246
Příbram
49.6899, 14.0104
100% uptime
|15msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)100msQuery time (median DNS query time - median ping) -
46.33.96.49Checked 4 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)38msQuery time (median DNS query time - median ping) -
46.33.101.161Checked 5 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
94% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
46.33.106.81Checked 3 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)38msQuery time (median DNS query time - median ping) -
46.33.106.161Checked 3 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
94% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)39msQuery time (median DNS query time - median ping) -
46.33.112.87Checked 24 minutes ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
98% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
46.33.115.145Checked 5 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
88% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)39msQuery time (median DNS query time - median ping) -
46.33.116.17Checked 4 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
94% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
46.33.116.49Checked 2 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)39msQuery time (median DNS query time - median ping) -
46.33.116.137Checked 6 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
46.33.116.201Checked 2 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
98% uptime
|14msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
46.33.118.129Checked 5 hours ago
Quantcom, a.s.
AS29208
Prostějov
49.4719, 17.1118
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
5.104.18.54Checked 5 hours ago
UnArtel s.r.o.
AS198977
Rudimov
49.0797, 17.8282
88% uptime
|21msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)58msQuery time (median DNS query time - median ping) -
188.75.144.225Checked 4 hours ago
JON.CZ s.r.o.
AS196735
Sadská
50.1360, 14.9863
100% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)31msQuery time (median DNS query time - median ping) -
188.75.169.26Checked 5 hours ago
JON.CZ s.r.o.
AS196735
Sadská
50.1360, 14.9863
94% uptime
|15msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)59msQuery time (median DNS query time - median ping) -
188.75.189.249Checked 1 hour ago
JON.CZ s.r.o.
AS196735
Šebrov-Kateřina
49.3287, 16.6005
99% uptime
|23msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)353msQuery time (median DNS query time - median ping) -
185.16.81.235Checked 2 hours ago
Netcom Solutions s.r.o.
AS206703
Sentice
49.3108, 16.4467
100% uptime
|11msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)22msQuery time (median DNS query time - median ping) -
46.33.96.51Checked 7 hours ago
Quantcom, a.s.
AS29208
Švábenice
49.2784, 17.1234
99% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)39msQuery time (median DNS query time - median ping) -
46.33.96.48Checked 6 hours ago
Quantcom, a.s.
AS29208
Terešov
49.8967, 13.6997
94% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)40msQuery time (median DNS query time - median ping) -
91.184.250.182Checked 6 hours ago
SmartApe OU
AS62212
Veselí nad Moravou
48.9536, 17.3765
94% uptime
|13msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)2msQuery time (median DNS query time - median ping) -
188.127.247.165Checked 5 hours ago
SmartApe OU
AS62212
Veselí nad Moravou
48.9536, 17.3765
100% uptime
|13msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)28msQuery time (median DNS query time - median ping) -
185.75.136.223Checked 5 hours ago
Vlasimnet s.r.o.
AS44500
Vlašim
49.7063, 14.8988
100% uptime
|21msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)84msQuery time (median DNS query time - median ping) -
46.255.8.2Checked 7 hours ago
ISP Alliance a.s.
AS52084
Vrchlabí
50.6270, 15.6094
98% uptime
|14msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)38msQuery time (median DNS query time - median ping) -
46.255.8.3Checked 22 minutes ago
ISP Alliance a.s.
AS52084
Vrchlabí
50.6270, 15.6094
99% uptime
|15msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)52msQuery time (median DNS query time - median ping) -
89.190.64.2Checked 6 hours ago
"N_SYS s.r.o."
AS41088
Vrchlabí
50.6270, 15.6094
100% uptime
|15msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)39msQuery time (median DNS query time - median ping) -
89.190.64.115Checked 3 hours ago
"N_SYS s.r.o."
AS41088
Vrchlabí
50.6270, 15.6094
100% uptime
|12msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)55msQuery time (median DNS query time - median ping) -
31.47.96.41Checked 28 minutes ago
FreeTel, s.r.o.
AS8251
Vsetín
49.3387, 17.9962
100% uptime
|22msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)67msQuery time (median DNS query time - median ping) -
31.47.98.57Checked 35 minutes ago
FreeTel, s.r.o.
AS8251
Vsetín
49.3387, 17.9962
100% uptime
|18msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)72msQuery time (median DNS query time - median ping) -
95.82.166.252Checked 2 hours ago
NETBOX Autonomous system
AS31246
Ždánice
49.0673, 17.0275
100% uptime
|17msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)58msQuery time (median DNS query time - median ping) -
95.82.166.253Checked 4 hours ago
NETBOX Autonomous system
AS31246
Ždánice
49.0673, 17.0275
100% uptime
|17msMedian ping from Nuremberg, Germany|0msJitter (1 standard deviation)47msQuery time (median DNS query time - median ping) -
131.117.208.241Checked 1 hour ago
AVONET, s.r.o.
AS20723
Zlín
49.2264, 17.6706
99% uptime
|21msMedian ping from Nuremberg, Germany|1msJitter (1 standard deviation)60msQuery time (median DNS query time - median ping)