Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before March 31, 2025

Country Max qps Min qps Trend Average
USA 7 067 5 999 6 432
other 4 208 3 509 3 873
Czechia 3 526 2 490 3 003
Germany 3 008 2 188 2 699
Netherlands 1 639 1 017 1 386
Sweden 1 191 895 1 118
France 896 682 792
Singapore 990 640 774
Ireland 1 016 469 746
China 822 595 686
UK 784 519 626
Russia 501 354 422
Brazil 436 348 396
India 431 337 385
Finland 381 219 323
Hong Kong SAR China 337 238 284

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before March 31, 2025

QTYPE Max qps Min qps Trend Average
A 13 679 11 255 12 700
NS 5 006 4 384 4 673
AAAA 2 995 2 411 2 755
DS 2 053 1 707 1 891
MX 861 452 663
other 554 418 492
TXT 401 190 290
SOA 205 98 132

Traffic flows – average distribution of QPS since 2025-03-24

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before March 31, 2025

City Max QPS Min QPS Trend Average
Frankfurt am Main 5 242 4 213 4 810
Praha 4 749 3 307 4 151
London 2 767 2 152 2 506
Reston (VA) 2 965 1 815 2 503
Seattle (WA) 2 387 1 953 2 177
Singapore 2 094 1 591 1 793
Tokyo 1 234 1 005 1 114
Stockholm 1 201 943 1 107
São Paulo 800 635 718
undisclosed 625 454 555
Wien 604 472 547
Kyiv 655 375 534
Bratislava 620 443 522
Los Angeles (CA) 346 107 216
Santiago de Chile 244 162 203
Milano 229 177 203
Johannesburg 231 178 199
Sydney 119 46 88

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before March 31, 2025

RCODE Max QPS Min QPS Trend Average
NoError 22 918 18 582 21 115
NXDomain 3 043 2 535 2 818
Refused 74 2 19
FormErr 1 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 March 20, 2025)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 215 768 3 361 1 072 067 1 080
United States 475 712 4 500 171 624 3 355
other 320 057 8 684 197 568 5 024
Sweden 224 239 160 223 082 87
Italy 221 255 246 218 108 42
United Kingdom 153 451 389 120 858 130
Germany 138 247 2 506 67 220 1 008
Slovakia 134 941 337 208 865 60

SLD networks

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

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS16509 AMAZON-02 288 262 2 326 5 099 2 078
AS208414 WEDOS Internet 260 038 8 260 032 7
AS24806 INTERNET CZ 224 210 125 220 048 30
AS25234 ACTIVE 24 185 852 6 185 856 7
AS29134 Webglobe 138 244 32 137 447 13
AS31034 Aruba 220 737 37 217 970 10
AS48689 Webglobe 127 788 10 127 093 2
other other 1 465 658 17 639 1 076 770 8 639

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].