Row

Resolvers

Country analysis – daily QPS averages for queries originating from resolvers in a given country during the last 30 days before May 1, 2024

Country Max qps Min qps Trend Average
USA 8 068 4 718 6 248
other 3 565 2 271 2 881
Czechia 3 018 1 740 2 629
Germany 2 211 958 1 803
Netherlands 1 229 554 945
France 786 441 629
Ireland 897 376 608
UK 600 384 504
China 640 355 487
Finland 681 292 462
Singapore 488 310 428
Sweden 1 951 148 335
India 348 201 293
Brazil 311 216 264
Russia 377 146 237
Canada 379 158 231

Query type analysis – daily QPS averages for queries with a given QTYPE during the last 30 days before May 1, 2024

QTYPE Max qps Min qps Trend Average
A 11 332 7 791 10 057
NS 4 769 2 464 3 163
AAAA 2 709 1 806 2 321
DS 3 211 1 253 1 747
MX 770 431 620
other 449 264 351
TXT 403 191 281
SOA 214 88 120

Traffic flows – average distribution of QPS since 2024-04-24

Authoritative servers

Server analysis – daily QPS averages for queries reaching an authoritative server in a given city during the last 30 days before May 1, 2024

City Max QPS Min QPS Trend Average
Praha 4 208 2 213 3 572
Frankfurt am Main 4 583 1 112 3 189
Seattle (WA) 2 959 1 828 2 629
Reston (VA) 4 065 1 359 2 379
London 2 477 1 478 2 124
Tokyo 947 600 822
Singapore 1 041 551 693
Wien 951 194 597
undisclosed 1 079 290 556
São Paulo 820 409 541
Stockholm 833 153 496
Bratislava 643 351 447
Sydney 987 43 347
Santiago de Chile 863 194 290
Kyiv 395 99 242
Johannesburg 291 135 199
Milano 243 43 101

Response code analysis – daily QPS averages for queries responded with a given RCODE during the last 30 days before May 1, 2024

RCODE Max QPS Min QPS Trend Average
NoError 19 659 13 609 17 340
NXDomain 3 213 1 064 1 640
Refused 80 2 9
FormErr 1 0 0
ServFail 3 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 April 25, 2024)

IPv4
IPv6
Country Domains Servers Domains Servers
Czechia 1 229 919 3 414 1 034 674 1 012
United States 458 726 5 865 181 815 5 261
other 378 598 7 418 195 017 2 999
Sweden 221 521 173 221 112 78
Italy 217 538 272 214 008 41
Germany 125 193 2 587 64 303 994
Slovakia 117 975 361 217 519 63
United Kingdom 103 012 463 99 608 121

SLD networks

Location of authoritative DNS servers for second-level domains under .cz – autonomous systems (as of April 25, 2024)

IPv4
IPv6
AS Providers Domains Servers Domains Servers
AS15685 CASABLANCA INT 154 096 225 81 167 67
AS16509 AMAZON-02 273 029 2 316 4 844 2 077
AS208414 WEDOS Internet 250 436 4 250 438 5
AS24806 INTERNET CZ 219 862 124 215 861 28
AS25234 ACTIVE 24 183 447 6 183 453 7
AS29134 Webglobe 122 273 34 121 380 15
AS31034 Aruba 215 860 37 213 084 10
other other 1 480 355 17 807 1 084 629 8 360

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].