Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before January 8, 2026

Country Max qps Min qps Trend Average
USA 8 480 7 192 7 778
other 6 579 4 394 5 174
Germany 4 252 2 791 3 358
Czechia 3 614 2 410 2 974
Netherlands 2 774 1 301 1 614
UK 1 272 898 1 090
France 1 266 925 1 060
Brazil 1 583 811 1 046
Ireland 1 259 763 1 013
Singapore 1 458 891 1 004
China 1 188 695 810
India 724 495 589
Russia 578 436 511
Japan 500 345 403
Sweden 434 308 385
Canada 409 273 341

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before January 8, 2026

QTYPE Max qps Min qps Trend Average
A 18 975 14 494 16 099
NS 5 373 4 225 4 718
AAAA 3 738 2 777 3 166
DS 3 207 2 458 2 765
MX 856 474 651
DNSKEY 642 484 543
TXT 423 249 333
other 385 267 332
SOA 297 151 204

Traffic flows – average distribution of QPS since 2026-01-01

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before January 8, 2026

City Max QPS Min QPS Trend Average
Frankfurt am Main 9 064 5 532 6 429
Praha 5 338 3 628 4 493
Reston (VA) 4 386 2 653 3 173
London 3 371 1 234 2 993
Singapore 2 921 2 160 2 456
São Paulo 2 449 1 652 1 996
Seattle (WA) 1 799 1 342 1 616
Tokyo 1 809 1 324 1 510
Wien 1 331 708 873
Stockholm 1 259 462 841
Bratislava 971 389 671
Johannesburg 525 376 449
undisclosed 491 315 409
Kyiv 500 243 347
Santiago de Chile 456 188 329
Milano 333 129 247
Los Angeles (CA) 422 173 237
Sydney 521 97 142

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before January 8, 2026

RCODE Max QPS Min QPS Trend Average
NoError 30 411 23 201 26 052
NXDomain 7 404 2 382 3 085
Refused 68 1 18
FormErr 3 1 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 January 1, 2026)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 228 374 3 290 1 088 346 1 127
United States 461 108 4 393 425 882 3 350
other 266 237 8 677 191 408 5 093
Italy 227 016 237 224 070 42
Sweden 224 594 163 223 490 93
United Kingdom 154 726 342 154 346 125
Slovakia 140 912 334 174 617 59
Germany 134 614 2 355 75 068 1 019

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of January 1, 2026)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS15685 CASABLANCA INT 130 050 234 82 239 72
AS16509 AMAZON-02 291 282 2 291 272 015 2 081
AS208414 WEDOS Internet 267 033 9 267 025 4
AS24806 INTERNET CZ 230 408 131 226 058 38
AS25234 ACTIVE 24 188 608 6 188 611 7
AS29134 Webglobe 138 377 33 137 627 12
AS31034 Aruba 226 539 40 223 953 9
other other 1 211 973 17 047 946 823 8 685

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].