DNS Server Issues in Czechia
67 DNS servers in Czechia with detected issues. These servers respond to probes but have problems that may affect usability.
Last updated: · All countries
Servers with issues
67 servers
| IP | ASN | Organization | Issue | Description | Reliability |
|---|---|---|---|---|---|
77.93.193.202
|
AS24971 | Master Internet s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 65% |
77.240.184.227
|
AS24641 | FASTER CZ spol. s r.o. | BAD_RESPONSE | Returns unexpected response codes | 64% |
185.175.11.11
|
AS215308 | Spolek PASKOV.net | BAD_RESPONSE | Returns unexpected response codes | 48% |
185.175.11.110
|
AS16246 | Nej.cz s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 47% |
89.187.142.9
|
AS35592 | Coolhousing s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 42% |
89.187.129.97
|
AS35592 | Coolhousing s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
89.187.131.164
|
AS35592 | Coolhousing s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
85.239.64.136
|
AS208329 | Ceska televize | BAD_RESPONSE | Returns unexpected response codes | 25% |
85.163.32.253
|
AS28725 | CETIN a.s. | BAD_RESPONSE | Returns unexpected response codes | 25% |
83.167.251.65
|
AS24971 | Master Internet s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
81.90.254.123
|
AS39761 | ABAK, Co.Ltd. | BAD_RESPONSE | Returns unexpected response codes | 25% |
81.201.60.130
|
AS8251 | FreeTel, s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
81.201.60.199
|
AS8251 | FreeTel, s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
78.108.102.212
|
AS8251 | FreeTel, s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
77.240.179.2
|
AS24641 | FASTER CZ spol. s r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
46.36.33.106
|
AS49101 | KABELOVA TELEVIZE CZ s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
194.108.42.2
|
AS5588 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 25% |
194.108.42.253
|
AS5588 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 25% |
185.151.171.15
|
AS201654 | Web4Soft Internet s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 25% |
91.139.15.41
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
89.24.6.10
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
88.146.130.81
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
82.142.82.201
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
82.142.83.93
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.216.238
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.234.18
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.237.193
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.244.170
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.197.205
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.216.111
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
81.2.216.150
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.95.112.247
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.95.119.149
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.202.140
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.202.181
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.199.207
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.217.73
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.202.21
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.203.5
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.205.18
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.206.202
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.207.55
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.207.79
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
80.211.208.167
|
AS24806 | INTERNET CZ, a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
78.80.187.195
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
78.44.232.186
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.157.1
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.30.84
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.31.78
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.202.253
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.204.2
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.206.134
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.206.138
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
77.48.209.210
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
62.77.85.98
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
62.77.94.72
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
62.168.1.146
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
46.174.16.254
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
31.30.7.150
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
31.30.51.50
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
31.30.141.68
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
31.30.142.68
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
141.170.158.24
|
AS16019 | Vodafone Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
109.183.173.249
|
AS13036 | T-Mobile Czech Republic a.s. | BAD_RESPONSE | Returns unexpected response codes | 22% |
91.146.120.230
|
AS198031 | Trustica s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 21% |
91.146.120.216
|
AS198031 | Trustica s.r.o. | BAD_RESPONSE | Returns unexpected response codes | 18% |
77.240.184.226
|
AS24641 | FASTER CZ spol. s r.o. | CENSORED | Censors or filters certain domains | 82% |
What do these issues mean?
- REFUSED — Server is online but refuses queries from outside its network. Likely an ISP resolver that only serves its own subscribers.
- NX_HIJACK — Server works but redirects non-existent domain lookups to its own IP, typically showing ads instead of an error.
- SERVFAIL — Server responds but returns internal errors. May be misconfigured or overloaded.
- NETWORK_ERROR — Connection to the server failed at the network level.
- NO_ANSWER — Server responds to the query but provides no answer data.
- CENSORED — Server returns different results for certain domains compared to neutral resolvers.