Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before November 6, 2025

Country Max qps Min qps Trend Average
USA 9 081 6 659 7 117
other 5 483 4 067 4 693
Czechia 3 591 2 728 3 185
Germany 3 480 2 709 3 148
Netherlands 1 991 1 333 1 745
Brazil 1 772 921 1 470
China 1 462 896 1 155
Sweden 1 244 319 1 125
Singapore 1 162 829 993
France 1 089 699 926
Ireland 986 516 786
UK 874 642 781
Russia 742 449 583
India 758 417 507
Japan 497 325 386
Finland 482 264 357

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before November 6, 2025

QTYPE Max qps Min qps Trend Average
A 17 784 14 021 15 641
NS 7 695 4 485 5 719
AAAA 3 619 2 892 3 303
DS 2 553 2 038 2 265
MX 908 478 713
other 638 429 497
TXT 386 180 292
CNAME 212 111 170

Traffic flows – average distribution of QPS since 2025-10-30

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before November 6, 2025

City Max QPS Min QPS Trend Average
Frankfurt am Main 6 592 5 309 6 104
Praha 5 377 3 584 4 577
Reston (VA) 5 215 2 907 3 426
London 2 829 1 758 2 364
Singapore 2 563 1 920 2 203
Seattle (WA) 2 299 1 644 1 969
Tokyo 2 384 1 504 1 797
São Paulo 1 910 1 129 1 627
Stockholm 1 401 554 1 236
Wien 750 561 662
Bratislava 745 533 653
Kyiv 673 347 518
Johannesburg 530 369 434
undisclosed 480 367 431
Santiago de Chile 440 252 366
Milano 329 165 265
Los Angeles (CA) 451 127 214
Sydney 185 95 127

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before November 6, 2025

RCODE Max QPS Min QPS Trend Average
NoError 27 509 22 846 25 614
NXDomain 5 187 2 214 3 338
Refused 43 3 8
ServFail 19 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 October 30, 2025)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 226 980 3 308 1 085 504 1 111
United States 477 910 4 400 438 636 3 335
other 283 311 8 693 196 061 5 075
Italy 226 901 240 223 780 42
Sweden 224 878 161 223 754 93
United Kingdom 155 200 368 121 714 131
Slovakia 141 239 334 185 174 59
Germany 140 467 2 363 75 127 1 009

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of October 30, 2025)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS16509 AMAZON-02 292 977 2 297 271 127 2 080
AS208414 WEDOS Internet 266 114 9 266 106 4
AS24806 INTERNET CZ 229 792 128 225 646 34
AS25234 ACTIVE 24 188 242 6 188 246 7
AS29134 Webglobe 137 935 29 137 179 11
AS31034 Aruba 226 399 40 223 647 10
AS48689 Webglobe 133 984 3 133 343 1
other other 1 379 428 17 355 1 028 160 8 708

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].