Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before March 14, 2026

Country Max qps Min qps Trend Average
USA 8 234 6 569 7 170
other 6 688 5 164 5 601
Germany 5 263 3 090 3 668
Czechia 3 777 2 763 3 310
Netherlands 2 007 1 159 1 600
Singapore 1 711 942 1 232
China 1 244 977 1 140
Ireland 1 542 795 1 097
France 1 277 845 1 088
UK 1 157 856 982
Brazil 985 729 840
Japan 974 333 670
India 876 539 620
Russia 654 382 494
Sweden 702 198 491
Poland 434 317 376

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before March 14, 2026

QTYPE Max qps Min qps Trend Average
A 18 339 15 240 17 031
NS 5 656 4 045 4 672
AAAA 4 178 2 913 3 297
DS 3 260 2 774 2 998
MX 869 469 664
DNSKEY 681 494 553
TXT 483 217 336
other 327 218 278
SOA 239 152 186

Traffic flows – average distribution of QPS since 2026-03-07

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before March 14, 2026

City Max QPS Min QPS Trend Average
Frankfurt am Main 8 235 5 702 6 831
Praha 6 017 4 196 5 160
London 3 808 3 296 3 587
Singapore 3 444 2 334 2 732
Tokyo 2 699 1 807 2 341
São Paulo 2 587 1 650 2 115
Stockholm 1 714 313 1 122
Seattle (WA) 1 268 938 1 081
Wien 1 306 849 968
Reston (VA) 3 718 615 945
Bratislava 884 251 671
Johannesburg 772 578 665
Kyiv 793 360 551
undisclosed 577 381 467
Santiago de Chile 505 296 396
Milano 420 242 304
Los Angeles (CA) 392 183 259
Sydney 352 124 182

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before March 14, 2026

RCODE Max QPS Min QPS Trend Average
NoError 29 071 24 758 26 922
NXDomain 4 259 2 601 3 443
Refused 56 2 19
ServFail 4 0 0
FormErr 1 0 0
NotAuth 0 0 0
NotImp 0 0 0
BADSIG 0 0 0
BADVERS 0 0 0

Row

IP version

Traffic rate by IP version – time series of daily QPS averages for IPv4 and IPv6

Protocol

Traffic rate by transport protocol – time series of daily QPS averages for UDP and TCP

SLD countries

Location of authoritative DNS servers for second-level domains under .cz – countries (as of March 12, 2026)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 209 786 3 275 1 110 113 1 136
United States 432 224 4 261 400 740 3 312
other 281 524 8 682 215 326 5 128
Italy 262 107 242 259 090 49
Sweden 224 982 162 223 891 91
United Kingdom 191 623 333 161 767 124
Slovakia 147 712 333 171 943 64
Germany 136 022 2 204 76 562 925

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of March 12, 2026)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS14061 DigitalOcean, LLC 106 599 170 102 398 68
AS16509 Amazon.com, Inc.  292 925 2 285 275 455 2 083
AS208414 WEDOS Internet 270 445 6 270 439 4
AS24806 INTERNET CZ 232 415 133 227 863 40
AS25234 ACTIVE 24 189 453 6 189 453 6
AS29134 Webglobe 144 872 44 144 101 12
AS31034 Aruba 228 422 40 225 746 9
other other 1 259 248 16 808 942 976 8 607

Catchment areas

Mapping of countries to a destination DNS server that receives most of the traffic from a given country.

DNSSEC

Traffic rate by DNSSEC – time series of daily QPS averages by DNSSEC support
Whether a DNS query supports DNSSEC or not is determined from the EDNS0 flag DNSSEC OK (DO) [RFC 3225].