Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before February 22, 2025

Country Max qps Min qps Trend Average
USA 9 955 6 092 6 628
other 4 172 3 449 3 857
Czechia 3 387 2 606 3 077
Germany 2 906 2 082 2 634
Netherlands 2 856 1 027 1 437
Sweden 1 152 400 1 024
Ireland 1 010 483 785
France 861 634 771
China 826 534 695
Singapore 812 591 691
UK 726 523 641
Russia 541 370 435
India 463 326 377
Brazil 437 326 374
Finland 1 046 251 368
Poland 358 249 300

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before February 22, 2025

QTYPE Max qps Min qps Trend Average
A 15 263 11 482 13 036
NS 4 679 3 963 4 310
AAAA 3 030 2 425 2 770
DS 2 051 1 653 1 901
MX 850 443 667
other 511 289 404
TXT 382 209 322
DNSKEY 3 714 185 318

Traffic flows – average distribution of QPS since 2025-02-15

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before February 22, 2025

City Max QPS Min QPS Trend Average
Frankfurt am Main 7 011 3 885 4 831
Praha 6 110 3 430 4 293
Reston (VA) 4 011 2 172 2 517
London 2 689 2 093 2 473
Seattle (WA) 2 579 2 094 2 386
Singapore 2 138 1 617 1 845
Tokyo 1 253 951 1 063
Stockholm 1 136 112 847
São Paulo 823 645 729
undisclosed 689 535 604
Wien 597 476 548
Bratislava 681 438 542
Kyiv 841 244 499
Johannesburg 328 195 276
Santiago de Chile 243 182 214
Milano 224 149 177
Los Angeles (CA) 223 89 146
Sydney 130 86 103

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before February 22, 2025

RCODE Max QPS Min QPS Trend Average
NoError 23 627 18 322 21 111
NXDomain 5 992 2 519 2 971
Refused 75 2 18
FormErr 0 0 0
ServFail 0 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 February 20, 2025)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 215 177 3 375 1 070 060 1 065
United States 476 231 4 501 169 681 3 352
other 323 436 8 725 199 492 5 036
Sweden 223 759 158 222 606 86
Italy 221 250 247 218 104 42
United Kingdom 152 796 393 120 520 130
Germany 135 366 2 513 63 718 1 002
Slovakia 134 967 342 210 674 59

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of February 20, 2025)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS16509 AMAZON-02 288 033 2 328 5 095 2 079
AS208414 WEDOS Internet 259 784 8 259 779 7
AS24806 INTERNET CZ 224 273 129 220 048 29
AS25234 ACTIVE 24 185 280 6 185 284 7
AS29134 Webglobe 138 406 33 137 529 13
AS31034 Aruba 220 727 37 217 960 11
AS48689 Webglobe 127 853 10 127 154 2
other other 1 466 417 17 703 1 073 152 8 624

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].