Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before October 17, 2025

Country Max qps Min qps Trend Average
USA 7 803 6 537 6 948
other 5 693 4 103 4 667
Germany 3 483 2 527 3 114
Czechia 3 633 1 785 3 109
Netherlands 2 124 1 248 1 706
Brazil 2 397 903 1 300
Sweden 1 330 1 132 1 214
China 1 376 861 1 045
Singapore 1 034 807 906
France 1 006 636 841
Ireland 1 100 399 787
UK 871 642 782
India 642 417 500
Russia 620 411 487
Japan 425 292 340
Canada 371 281 329

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before October 17, 2025

QTYPE Max qps Min qps Trend Average
A 17 714 13 442 15 259
NS 5 932 4 949 5 460
AAAA 3 455 2 742 3 173
DS 2 403 1 804 2 142
MX 882 495 707
other 826 553 678
TXT 454 189 307

Traffic flows – average distribution of QPS since 2025-10-10

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before October 17, 2025

City Max QPS Min QPS Trend Average
Frankfurt am Main 7 346 5 306 6 335
Praha 5 189 1 682 4 384
Reston (VA) 3 604 2 881 3 167
Singapore 2 527 1 908 2 104
Seattle (WA) 2 299 1 874 2 051
London 2 749 1 304 2 011
Tokyo 2 480 1 496 1 761
São Paulo 2 376 1 228 1 474
Stockholm 1 351 1 154 1 269
Wien 749 554 645
Bratislava 745 559 643
Kyiv 637 319 510
Johannesburg 617 384 453
undisclosed 461 345 424
Milano 412 72 283
Santiago de Chile 478 114 257
Los Angeles (CA) 402 81 207
Sydney 157 95 116

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before October 17, 2025

RCODE Max QPS Min QPS Trend Average
NoError 26 508 21 965 24 704
NXDomain 4 918 2 966 3 367
Refused 37 2 9
ServFail 35 0 1
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 October 16, 2025)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 226 466 3 309 1 084 437 1 115
United States 476 777 4 414 172 807 3 345
other 286 151 8 685 196 264 5 057
Italy 226 482 241 223 359 42
Sweden 225 015 161 223 883 91
United Kingdom 155 011 374 121 579 129
Slovakia 141 164 337 187 432 59
Germany 139 964 2 379 74 986 1 011

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of October 16, 2025)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS16509 AMAZON-02 291 644 2 296 5 207 2 078
AS208414 WEDOS Internet 265 875 9 265 869 5
AS24806 INTERNET CZ 229 390 127 225 230 34
AS25234 ACTIVE 24 188 231 6 188 235 7
AS29134 Webglobe 137 866 29 137 107 11
AS31034 Aruba 225 977 39 223 226 10
AS48689 Webglobe 133 904 3 133 262 1
other other 1 385 343 17 391 1 032 144 8 703

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].