Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before January 21, 2025

Country Max qps Min qps Trend Average
USA 7 481 6 037 6 484
other 3 861 3 261 3 564
Czechia 3 349 2 432 2 868
Germany 2 836 1 955 2 428
Netherlands 1 490 895 1 188
Sweden 1 147 1 013 1 064
France 1 157 587 751
Singapore 915 568 750
Ireland 905 437 656
China 772 495 592
UK 689 472 574
Russia 530 355 410
India 450 326 386
Brazil 597 267 341
Finland 364 193 296
Japan 315 249 273

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before January 21, 2025

QTYPE Max qps Min qps Trend Average
A 13 649 10 962 12 091
NS 4 722 3 738 4 231
AAAA 2 956 2 371 2 644
DS 2 041 1 653 1 833
MX 875 425 629
TXT 437 201 290
other 298 232 266
CNAME 206 111 156
SOA 247 114 151

Traffic flows – average distribution of QPS since 2025-01-14

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before January 21, 2025

City Max QPS Min QPS Trend Average
Frankfurt am Main 4 908 3 642 4 264
Praha 4 724 3 217 3 919
London 2 835 2 187 2 492
Reston (VA) 3 103 2 101 2 379
Seattle (WA) 2 533 2 196 2 379
Singapore 2 134 1 148 1 438
Tokyo 1 188 963 1 075
Stockholm 1 130 965 1 027
São Paulo 841 590 651
undisclosed 672 422 557
Wien 608 462 535
Bratislava 550 423 480
Kyiv 645 271 466
Johannesburg 319 233 267
Santiago de Chile 361 193 228
Los Angeles (CA) 334 84 216
Milano 211 136 167
Sydney 104 72 85

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before January 21, 2025

RCODE Max QPS Min QPS Trend Average
NoError 22 316 17 588 19 753
NXDomain 3 267 2 654 2 860
Refused 80 3 17
NotImp 1 0 0
FormErr 0 0 0
ServFail 0 0 0
NotAuth 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 January 9, 2025)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 208 331 3 365 1 063 993 1 035
United States 472 517 4 510 169 349 3 354
other 324 576 8 745 199 090 5 001
Sweden 222 118 152 221 667 84
Italy 220 254 252 217 099 41
United Kingdom 152 129 392 120 065 133
Slovakia 135 137 343 211 740 59
Germany 125 706 2 520 63 062 990

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of January 9, 2025)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS16509 AMAZON-02 285 038 2 330 5 073 2 080
AS208414 WEDOS Internet 257 523 8 257 518 7
AS24806 INTERNET CZ 222 629 129 218 348 25
AS25234 ACTIVE 24 184 294 6 184 298 7
AS29134 Webglobe 138 660 32 137 777 14
AS31034 Aruba 219 039 39 216 265 10
AS48689 Webglobe 128 052 10 127 343 2
other other 1 460 835 17 725 1 073 659 8 552

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].