DNSSEC Debugger

Domain Name:

Time: 2025-09-17 13:56:58 UTC

Analyzing DNSSEC problems for nic.cz

DS=20326/SHA-256 is now in the chain-of-trust

	Checking DS between Trust Anchor and .
	`. IN DS ( 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d )`
	Query to f.root-servers.net for ./DNSKEY
	Received 1414 bytes from 192.5.5.241
	;; Response received from [192.5.5.241] 1414 octets ;; HEADER SECTION ;; id = 63068 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 5 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 65535, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (5 records) . 172800 IN DNSKEY ( 256 3 8 AwEAAbEbGCpGTDrcZTWqWWE72nphyshpRcILdzCVlBGU9Ln1Fui9kkseUOP+g5GLUeVFKdTloeRT A9+EYiQdXgWXmXmuW/nGxZjAikluF/O9NzLVrr5iZnth2xu+F48nrJlAgWWiMNau54NI5sZ3iVQf hFsq2pZmf43RauRPniYMShOLO7EBWWXr5glDSgZGS9fSm6xHwwF+g8D4m8oanjvdCBNxXzSEKS31 ibxjLifTfvwCg3y4XXcNW9U6Nu3JmoKUdxqpPPIkBvVQbIz4UO2FwaR13uXC03ALP1Yx2QNSS4SZ lcIMtAftQR9wtCiuPWQnFv4jkzWqlhp1Lmf7bcoL9yk= ) ; keytag 53148 . 172800 IN DNSKEY ( 256 3 8 AwEAAbauxLSFZ+KSWi2cT6TJbm3d+GIVqb2N1XnDjMsRme0b6JlGp/cvwmM5CaJ5LQ7tG1r7LuTH jYZadtbNk2nZmclq9r4KInS48ungoAZb0gJXVw8IvBTBb1YWQmiBqD285pJuORwTii7DF++nNJJk 3i55HJt9SmBI7m7t8nvx7OOY/w0inxg3fLH2uY0SKO8he4FGwMc4Ubiab8N8Yhyhh+FkKKdD/+oA cuGF75PjlSXO460B4MlNLlEcjDEzIsKauRYx4YVgSaNomGhMMFblmXRzgW+1R6ywvm5mC9+omlyy izZp2GJfPwGMezuKSGDndO6CYYEc5/lsRhvBYsGjdPM= ) ; keytag 46441 . 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; keytag 20326 . 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696 . 172800 IN RRSIG ( DNSKEY 8 0 172800 20250930000000 20250909000000 20326 . aqj52+DKW6PhTa31l3xyxa0lbMd8T/UyK1sNUC42EY1+cSp0hSC0VlW82RsWYU5G5NmewrInT/Sx glWFlFz94yVqiKAK7ZNQr94nRbA7okrrlfnloiBi3cQ1IvEUgvNcmlZMLTeA6rINvdcBwS7ljMOH m0vQDce9IOxhQT7iAu23oiNORw5nWG/npNkYRFDD4yQvD3HsNeXFTuyDuc57ZEjs/pnIG5nkcqx7 tp/ba3XbOGllDr/V/0ubak7OeWum1eckIljqUsx5BnfBfIA7rJ2JJBIT7JMJ/O/cflTKoJFHQoKG TVYrNVBq9vsnZ01Q4ss688IvI8vO3zkP6LQLEA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 4 DNSKEY records for .
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAbEbGCpGTDrcZTWqWWE72nphyshpRcILdzCVlBGU9Ln1Fui9kkseUOP+g5GLUeVFKdTloeRT A9+EYiQdXgWXmXmuW/nGxZjAikluF/O9NzLVrr5iZnth2xu+F48nrJlAgWWiMNau54NI5sZ3iVQf hFsq2pZmf43RauRPniYMShOLO7EBWWXr5glDSgZGS9fSm6xHwwF+g8D4m8oanjvdCBNxXzSEKS31 ibxjLifTfvwCg3y4XXcNW9U6Nu3JmoKUdxqpPPIkBvVQbIz4UO2FwaR13uXC03ALP1Yx2QNSS4SZ lcIMtAftQR9wtCiuPWQnFv4jkzWqlhp1Lmf7bcoL9yk= ) ; keytag 53148`
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAbauxLSFZ+KSWi2cT6TJbm3d+GIVqb2N1XnDjMsRme0b6JlGp/cvwmM5CaJ5LQ7tG1r7LuTH jYZadtbNk2nZmclq9r4KInS48ungoAZb0gJXVw8IvBTBb1YWQmiBqD285pJuORwTii7DF++nNJJk 3i55HJt9SmBI7m7t8nvx7OOY/w0inxg3fLH2uY0SKO8he4FGwMc4Ubiab8N8Yhyhh+FkKKdD/+oA cuGF75PjlSXO460B4MlNLlEcjDEzIsKauRYx4YVgSaNomGhMMFblmXRzgW+1R6ywvm5mC9+omlyy izZp2GJfPwGMezuKSGDndO6CYYEc5/lsRhvBYsGjdPM= ) ; keytag 46441`
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; keytag 20326`
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696`
	DNSKEY=20326/SEP is now in the chain-of-trust
	DS=20326/SHA-256 verifies DNSKEY=20326/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`. 172800 IN RRSIG ( DNSKEY 8 0 172800 20250930000000 20250909000000 20326 . aqj52+DKW6PhTa31l3xyxa0lbMd8T/UyK1sNUC42EY1+cSp0hSC0VlW82RsWYU5G5NmewrInT/Sx glWFlFz94yVqiKAK7ZNQr94nRbA7okrrlfnloiBi3cQ1IvEUgvNcmlZMLTeA6rINvdcBwS7ljMOH m0vQDce9IOxhQT7iAu23oiNORw5nWG/npNkYRFDD4yQvD3HsNeXFTuyDuc57ZEjs/pnIG5nkcqx7 tp/ba3XbOGllDr/V/0ubak7OeWum1eckIljqUsx5BnfBfIA7rJ2JJBIT7JMJ/O/cflTKoJFHQoKG TVYrNVBq9vsnZ01Q4ss688IvI8vO3zkP6LQLEA== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=53148 is now in the chain-of-trust
	DNSKEY=46441 is now in the chain-of-trust
	DNSKEY=38696/SEP is now in the chain-of-trust
	Query to k.root-servers.net for nic.cz/A
	Received 613 bytes from 193.0.14.129
	;; Response received from [193.0.14.129] 613 octets ;; HEADER SECTION ;; id = 38873 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS b.ns.nic.cz. cz. 172800 IN NS c.ns.nic.cz. cz. 172800 IN NS d.ns.nic.cz. cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250930050000 20250917040000 46441 . pZfpQno5miJA/UAlNqAbM3T7l37sCPjlXORClOXyzrRB4ZzkoD5tL7UKFjiFvP0q93wPwF5PzTi6 VN0rwKK9ThdhWzE7bx11XWU+/Pfu7sxAfLjnFOSeGb7xtl+WQSGWb7KCoyzJVvjYrhEwENGZWysv y86HF4Soe6sXXDmQbnqBbQaavW6KjMrcUgTCMYQKZSQh99lKE12peWYJMwYHMuN+Iciv3l+7f97J 4rHub+fFyb3ZTLTc2WYvv71kiPM89JHN8JsqCPMN2+FFvcD99VGGrpyGiW3XhqfretXhIWk9F9eB DuOq1OXreJOOukA/WBfxWJpNUJ/odhGLMQZRcw== ) ;; ADDITIONAL SECTION (9 records) a.ns.nic.cz. 172800 IN A 194.0.12.1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 172800 IN A 194.0.13.1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 c.ns.nic.cz. 172800 IN A 194.0.14.1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 d.ns.nic.cz. 172800 IN A 193.29.206.1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 ;; { "EDNS-VERSION": 0 }
	Query to e.root-servers.net for cz/DNSKEY
	Received 613 bytes from 192.203.230.10
	;; Response received from [192.203.230.10] 613 octets ;; HEADER SECTION ;; id = 11308 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cz. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS b.ns.nic.cz. cz. 172800 IN NS c.ns.nic.cz. cz. 172800 IN NS d.ns.nic.cz. cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250930050000 20250917040000 46441 . pZfpQno5miJA/UAlNqAbM3T7l37sCPjlXORClOXyzrRB4ZzkoD5tL7UKFjiFvP0q93wPwF5PzTi6 VN0rwKK9ThdhWzE7bx11XWU+/Pfu7sxAfLjnFOSeGb7xtl+WQSGWb7KCoyzJVvjYrhEwENGZWysv y86HF4Soe6sXXDmQbnqBbQaavW6KjMrcUgTCMYQKZSQh99lKE12peWYJMwYHMuN+Iciv3l+7f97J 4rHub+fFyb3ZTLTc2WYvv71kiPM89JHN8JsqCPMN2+FFvcD99VGGrpyGiW3XhqfretXhIWk9F9eB DuOq1OXreJOOukA/WBfxWJpNUJ/odhGLMQZRcw== ) ;; ADDITIONAL SECTION (9 records) a.ns.nic.cz. 172800 IN A 194.0.12.1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 172800 IN A 194.0.13.1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 c.ns.nic.cz. 172800 IN A 194.0.14.1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 d.ns.nic.cz. 172800 IN A 193.29.206.1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 ;; { "EDNS-VERSION": 0 }
	Found child zone cz

	Checking DS between . and cz
	Query to j.root-servers.net for cz/DS
	Received 366 bytes from 192.58.128.30
	;; Response received from [192.58.128.30] 366 octets ;; HEADER SECTION ;; id = 876 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cz. IN DS ;; ANSWER SECTION (2 records) cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250930050000 20250917040000 46441 . pZfpQno5miJA/UAlNqAbM3T7l37sCPjlXORClOXyzrRB4ZzkoD5tL7UKFjiFvP0q93wPwF5PzTi6 VN0rwKK9ThdhWzE7bx11XWU+/Pfu7sxAfLjnFOSeGb7xtl+WQSGWb7KCoyzJVvjYrhEwENGZWysv y86HF4Soe6sXXDmQbnqBbQaavW6KjMrcUgTCMYQKZSQh99lKE12peWYJMwYHMuN+Iciv3l+7f97J 4rHub+fFyb3ZTLTc2WYvv71kiPM89JHN8JsqCPMN2+FFvcD99VGGrpyGiW3XhqfretXhIWk9F9eB DuOq1OXreJOOukA/WBfxWJpNUJ/odhGLMQZRcw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for cz in the . zone
	DS=20237/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`cz. 86400 IN RRSIG ( DS 8 1 86400 20250930050000 20250917040000 46441 . pZfpQno5miJA/UAlNqAbM3T7l37sCPjlXORClOXyzrRB4ZzkoD5tL7UKFjiFvP0q93wPwF5PzTi6 VN0rwKK9ThdhWzE7bx11XWU+/Pfu7sxAfLjnFOSeGb7xtl+WQSGWb7KCoyzJVvjYrhEwENGZWysv y86HF4Soe6sXXDmQbnqBbQaavW6KjMrcUgTCMYQKZSQh99lKE12peWYJMwYHMuN+Iciv3l+7f97J 4rHub+fFyb3ZTLTc2WYvv71kiPM89JHN8JsqCPMN2+FFvcD99VGGrpyGiW3XhqfretXhIWk9F9eB DuOq1OXreJOOukA/WBfxWJpNUJ/odhGLMQZRcw== )`
	RRSIG=46441 and DNSKEY=46441 verifies the DS RRset
	DS=20237/SHA-256 is now in the chain-of-trust
	`cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 )`
	Query to a.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 289 octets ;; HEADER SECTION ;; id = 63771 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 3 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cz. IN DNSKEY ;; ANSWER SECTION (3 records) cz. 3600 IN DNSKEY ( 256 3 13 JJlKmXgAN6u+5Wek++4dSM6ErKxYappV5s7VQa6E711bfUmSiS1ctrM4GAJo/KqE9RrJbpHXLBVt FyTTVpTXkA== ) ; keytag 53446 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20250926122134 20250912105134 20237 cz. iF/R8lbOircqQnR5TupXQCXytlBfkaaIUHqtq6Hn8zQaNLFVk1w/wGWwOm2HU6vX4GMl3yYiFFyc x/knjbKmMw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 JJlKmXgAN6u+5Wek++4dSM6ErKxYappV5s7VQa6E711bfUmSiS1ctrM4GAJo/KqE9RrJbpHXLBVt FyTTVpTXkA== ) ; keytag 53446`
	`cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237`
	DNSKEY=20237/SEP is now in the chain-of-trust
	DS=20237/SHA-256 verifies DNSKEY=20237/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20250926122134 20250912105134 20237 cz. iF/R8lbOircqQnR5TupXQCXytlBfkaaIUHqtq6Hn8zQaNLFVk1w/wGWwOm2HU6vX4GMl3yYiFFyc x/knjbKmMw== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=53446 is now in the chain-of-trust
	Query to b.ns.nic.cz for nic.cz/A
	Received 153 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 153 octets ;; HEADER SECTION ;; id = 59522 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	b.ns.nic.cz is authoritative for nic.cz
	Query to c.ns.nic.cz for nic.cz/DNSKEY
	Received 297 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 297 octets ;; HEADER SECTION ;; id = 48145 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 3 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN DNSKEY ;; ANSWER SECTION (3 records) nic.cz. 1800 IN DNSKEY ( 257 3 13 sJL1/SM+Pqd3AQ4WJCzxDKwiNt8XpM6Q7Z9dnm4pdej2TWbh+UTZUwslC0CJgmLnResehnwg+DpZ LYOmi+i+PA== ) ; keytag 53688 nic.cz. 1800 IN DNSKEY ( 256 3 13 9ZdIcNxVarMsZco/dwsiD2z3+8aRb1pmcYi6ifxKEpZxZF46Nu5Dweulp40Eu41dwF+frEAkdEVt 0KrR+JMf5g== ) ; keytag 23954 nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20251001102554 20250917085554 53688 nic.cz. WUC48QYwnHcWadJKeN2edw70VZfiu0t0twWWzz/FndTUzfoa1SX7+v6retllrGtf0DUFaMak6n1T 8MNBK635ww== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found child zone nic.cz
	Attempting to learn nameservers for nic.cz
	Query to d.ns.nic.cz for nic.cz/NS
	Received 938 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 938 octets ;; HEADER SECTION ;; id = 32532 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 4 ;; nscount = 0 arcount = 13 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN NS ;; ANSWER SECTION (4 records) nic.cz. 1800 IN NS b.ns.nic.cz. nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20251001074536 20250917061536 23954 nic.cz. WLTfXzo7aKRr9oCzZ8Mhe1p1tqL1992LHe6835NNcckbtA78qo6E2QT2HIViwEkXsKQcRby6DmIc kzooMWJGPg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (13 records) a.ns.nic.cz. 1800 IN A 194.0.12.1 b.ns.nic.cz. 1800 IN A 194.0.13.1 d.ns.nic.cz. 1800 IN A 193.29.206.1 a.ns.nic.cz. 1800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 1800 IN AAAA 2001:678:10::1 d.ns.nic.cz. 1800 IN AAAA 2001:678:1::1 a.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ntg8omWYxhmZCqG4OQ0yyonEvatSp/pdQKpKTj8u3U7JHPAqkDnBmMiQKUOhVQpGy7N+UtaCCB8h 3vZIlr4l0g== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. V2DsRMKk9G2R2xqMLQ9Qcgis/SiOBJ/n+IcZHsEWmPFUkrzlD7blVZU3JqnYIt/Kk03dYVpCIdH/ 3iYTz9RfSQ== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. NbZ/KnAELkZZu/8UDPdSZJbvzFayo5X23V7zT9Niv2EX8TYadflPFTQ2Izc66KwGK/+QR0ap/nRB bgFMlNuvIg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. CH1usjrwwrTCWPfyCuAQYQGtztvXteFatNfV0vu/RrzM3FNEvRGnXY+ZwTsJyUiG6nwIOSx8qdXe SMWHL4nqgQ== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ZWqr6D9eNveyiPEgiKE0wyWihmPu6e+WJKxSr6fDmtcJnMBVF3CqqV2VGjTIij/o7/fe9o+dUZKp yJN3My/k3Q== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. eUc03eACoGGNt3Lgyx2oPXSdUytqne2a1/MnRxOhn96DQLyCNDfmQtFFreXBd3V+zdWb8uv9zgLA pGiQI3Or3g== ) ;; { "EDNS-VERSION": 0 }
	Found nic.cz nameservers: b.ns.nic.cz, d.ns.nic.cz, a.ns.nic.cz

nic.cz

	Checking DS between cz and nic.cz
	Query to b.ns.nic.cz for nic.cz/DS
	Received 181 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 181 octets ;; HEADER SECTION ;; id = 50718 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN DS ;; ANSWER SECTION (2 records) nic.cz. 3600 IN DS ( 53688 13 2 47ca3c7b812e4664194dc2b0833d752da1fccb36fc9c7b8b76e9bd4fe3ad2dcf ) nic.cz. 3600 IN RRSIG ( DS 13 2 3600 20250928181655 20250914164655 53446 cz. m24TOVBeXBrSYaZSy9tkUtxACm4aOM3Ra+pi6DnGgnBKfx6WflAgYZv9H0ekfHlz4fOmLCN/e/vp 8pDunPOUcw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for nic.cz in the cz zone
	DS=53688/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`nic.cz. 3600 IN RRSIG ( DS 13 2 3600 20250928181655 20250914164655 53446 cz. m24TOVBeXBrSYaZSy9tkUtxACm4aOM3Ra+pi6DnGgnBKfx6WflAgYZv9H0ekfHlz4fOmLCN/e/vp 8pDunPOUcw== )`
	RRSIG=53446 and DNSKEY=53446 verifies the DS RRset
	DS=53688/SHA-256 is now in the chain-of-trust
	`nic.cz. 3600 IN DS ( 53688 13 2 47ca3c7b812e4664194dc2b0833d752da1fccb36fc9c7b8b76e9bd4fe3ad2dcf )`
	Query to d.ns.nic.cz for nic.cz/DNSKEY
	Received 297 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 297 octets ;; HEADER SECTION ;; id = 23818 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 3 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN DNSKEY ;; ANSWER SECTION (3 records) nic.cz. 1800 IN DNSKEY ( 256 3 13 9ZdIcNxVarMsZco/dwsiD2z3+8aRb1pmcYi6ifxKEpZxZF46Nu5Dweulp40Eu41dwF+frEAkdEVt 0KrR+JMf5g== ) ; keytag 23954 nic.cz. 1800 IN DNSKEY ( 257 3 13 sJL1/SM+Pqd3AQ4WJCzxDKwiNt8XpM6Q7Z9dnm4pdej2TWbh+UTZUwslC0CJgmLnResehnwg+DpZ LYOmi+i+PA== ) ; keytag 53688 nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20251001102554 20250917085554 53688 nic.cz. WUC48QYwnHcWadJKeN2edw70VZfiu0t0twWWzz/FndTUzfoa1SX7+v6retllrGtf0DUFaMak6n1T 8MNBK635ww== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for nic.cz
	`nic.cz. 1800 IN DNSKEY ( 256 3 13 9ZdIcNxVarMsZco/dwsiD2z3+8aRb1pmcYi6ifxKEpZxZF46Nu5Dweulp40Eu41dwF+frEAkdEVt 0KrR+JMf5g== ) ; keytag 23954`
	`nic.cz. 1800 IN DNSKEY ( 257 3 13 sJL1/SM+Pqd3AQ4WJCzxDKwiNt8XpM6Q7Z9dnm4pdej2TWbh+UTZUwslC0CJgmLnResehnwg+DpZ LYOmi+i+PA== ) ; keytag 53688`
	DNSKEY=53688/SEP is now in the chain-of-trust
	DS=53688/SHA-256 verifies DNSKEY=53688/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20251001102554 20250917085554 53688 nic.cz. WUC48QYwnHcWadJKeN2edw70VZfiu0t0twWWzz/FndTUzfoa1SX7+v6retllrGtf0DUFaMak6n1T 8MNBK635ww== )`
	RRSIG=53688 and DNSKEY=53688/SEP verifies the DNSKEY RRset
	DNSKEY=23954 is now in the chain-of-trust
	Query to a.ns.nic.cz for nic.cz/A
	Received 153 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 153 octets ;; HEADER SECTION ;; id = 34247 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	a.ns.nic.cz is authoritative for nic.cz
	Found RRSIG signed by nic.cz zone
	Query to b.ns.nic.cz for nic.cz/SOA
	Received 189 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 189 octets ;; HEADER SECTION ;; id = 4656 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN SOA ;; ANSWER SECTION (2 records) nic.cz. 1800 IN SOA ( a.ns.nic.cz. hostmaster.nic.cz. 1758108770 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20251001113250 20250917100250 23954 nic.cz. 3bgaialu27W86N+lNb29GQqHp0SoYbkYfoykN+PFiXi4XT2iM0dJ7cv51Pf9PSXfsrG3iL7tIiUS m1jnTZaEpg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Query to d.ns.nic.cz for nic.cz/SOA
	Received 1087 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 1087 octets ;; HEADER SECTION ;; id = 26454 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 4 arcount = 13 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN SOA ;; ANSWER SECTION (2 records) nic.cz. 1800 IN SOA ( a.ns.nic.cz. hostmaster.nic.cz. 1758108770 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20251001113250 20250917100250 23954 nic.cz. 3bgaialu27W86N+lNb29GQqHp0SoYbkYfoykN+PFiXi4XT2iM0dJ7cv51Pf9PSXfsrG3iL7tIiUS m1jnTZaEpg== ) ;; AUTHORITY SECTION (4 records) nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN NS b.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20251001074536 20250917061536 23954 nic.cz. WLTfXzo7aKRr9oCzZ8Mhe1p1tqL1992LHe6835NNcckbtA78qo6E2QT2HIViwEkXsKQcRby6DmIc kzooMWJGPg== ) ;; ADDITIONAL SECTION (13 records) a.ns.nic.cz. 1800 IN A 194.0.12.1 b.ns.nic.cz. 1800 IN A 194.0.13.1 d.ns.nic.cz. 1800 IN A 193.29.206.1 a.ns.nic.cz. 1800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 1800 IN AAAA 2001:678:10::1 d.ns.nic.cz. 1800 IN AAAA 2001:678:1::1 a.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ntg8omWYxhmZCqG4OQ0yyonEvatSp/pdQKpKTj8u3U7JHPAqkDnBmMiQKUOhVQpGy7N+UtaCCB8h 3vZIlr4l0g== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. V2DsRMKk9G2R2xqMLQ9Qcgis/SiOBJ/n+IcZHsEWmPFUkrzlD7blVZU3JqnYIt/Kk03dYVpCIdH/ 3iYTz9RfSQ== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. NbZ/KnAELkZZu/8UDPdSZJbvzFayo5X23V7zT9Niv2EX8TYadflPFTQ2Izc66KwGK/+QR0ap/nRB bgFMlNuvIg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. CH1usjrwwrTCWPfyCuAQYQGtztvXteFatNfV0vu/RrzM3FNEvRGnXY+ZwTsJyUiG6nwIOSx8qdXe SMWHL4nqgQ== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ZWqr6D9eNveyiPEgiKE0wyWihmPu6e+WJKxSr6fDmtcJnMBVF3CqqV2VGjTIij/o7/fe9o+dUZKp yJN3My/k3Q== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. eUc03eACoGGNt3Lgyx2oPXSdUytqne2a1/MnRxOhn96DQLyCNDfmQtFFreXBd3V+zdWb8uv9zgLA pGiQI3Or3g== ) ;; { "EDNS-VERSION": 0 }
	Query to a.ns.nic.cz for nic.cz/A
	Received 153 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 153 octets ;; HEADER SECTION ;; id = 19896 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	nic.cz A RR has value 217.31.205.50
	Found 1 RRSIGs over A RRset
	`nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== )`
	RRSIG=23954 and DNSKEY=23954 verifies the A RRset

nic.cz

	Query to d.ns.nic.cz for nic.cz/A
	Received 1056 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 1056 octets ;; HEADER SECTION ;; id = 43712 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 4 arcount = 13 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (4 records) nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN NS b.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20251001074536 20250917061536 23954 nic.cz. WLTfXzo7aKRr9oCzZ8Mhe1p1tqL1992LHe6835NNcckbtA78qo6E2QT2HIViwEkXsKQcRby6DmIc kzooMWJGPg== ) ;; ADDITIONAL SECTION (13 records) a.ns.nic.cz. 1800 IN A 194.0.12.1 b.ns.nic.cz. 1800 IN A 194.0.13.1 d.ns.nic.cz. 1800 IN A 193.29.206.1 a.ns.nic.cz. 1800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 1800 IN AAAA 2001:678:10::1 d.ns.nic.cz. 1800 IN AAAA 2001:678:1::1 a.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ntg8omWYxhmZCqG4OQ0yyonEvatSp/pdQKpKTj8u3U7JHPAqkDnBmMiQKUOhVQpGy7N+UtaCCB8h 3vZIlr4l0g== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. V2DsRMKk9G2R2xqMLQ9Qcgis/SiOBJ/n+IcZHsEWmPFUkrzlD7blVZU3JqnYIt/Kk03dYVpCIdH/ 3iYTz9RfSQ== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. NbZ/KnAELkZZu/8UDPdSZJbvzFayo5X23V7zT9Niv2EX8TYadflPFTQ2Izc66KwGK/+QR0ap/nRB bgFMlNuvIg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. CH1usjrwwrTCWPfyCuAQYQGtztvXteFatNfV0vu/RrzM3FNEvRGnXY+ZwTsJyUiG6nwIOSx8qdXe SMWHL4nqgQ== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ZWqr6D9eNveyiPEgiKE0wyWihmPu6e+WJKxSr6fDmtcJnMBVF3CqqV2VGjTIij/o7/fe9o+dUZKp yJN3My/k3Q== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. eUc03eACoGGNt3Lgyx2oPXSdUytqne2a1/MnRxOhn96DQLyCNDfmQtFFreXBd3V+zdWb8uv9zgLA pGiQI3Or3g== ) ;; { "EDNS-VERSION": 0 }
	d.ns.nic.cz is authoritative for nic.cz
	Found RRSIG signed by nic.cz zone
	Query to d.ns.nic.cz for nic.cz/A
	Received 1056 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 1056 octets ;; HEADER SECTION ;; id = 5373 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 4 arcount = 13 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (4 records) nic.cz. 1800 IN NS b.ns.nic.cz. nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20251001074536 20250917061536 23954 nic.cz. WLTfXzo7aKRr9oCzZ8Mhe1p1tqL1992LHe6835NNcckbtA78qo6E2QT2HIViwEkXsKQcRby6DmIc kzooMWJGPg== ) ;; ADDITIONAL SECTION (13 records) a.ns.nic.cz. 1800 IN A 194.0.12.1 b.ns.nic.cz. 1800 IN A 194.0.13.1 d.ns.nic.cz. 1800 IN A 193.29.206.1 a.ns.nic.cz. 1800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 1800 IN AAAA 2001:678:10::1 d.ns.nic.cz. 1800 IN AAAA 2001:678:1::1 a.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ntg8omWYxhmZCqG4OQ0yyonEvatSp/pdQKpKTj8u3U7JHPAqkDnBmMiQKUOhVQpGy7N+UtaCCB8h 3vZIlr4l0g== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. V2DsRMKk9G2R2xqMLQ9Qcgis/SiOBJ/n+IcZHsEWmPFUkrzlD7blVZU3JqnYIt/Kk03dYVpCIdH/ 3iYTz9RfSQ== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. NbZ/KnAELkZZu/8UDPdSZJbvzFayo5X23V7zT9Niv2EX8TYadflPFTQ2Izc66KwGK/+QR0ap/nRB bgFMlNuvIg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. CH1usjrwwrTCWPfyCuAQYQGtztvXteFatNfV0vu/RrzM3FNEvRGnXY+ZwTsJyUiG6nwIOSx8qdXe SMWHL4nqgQ== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251001080006 20250917063006 23954 nic.cz. ZWqr6D9eNveyiPEgiKE0wyWihmPu6e+WJKxSr6fDmtcJnMBVF3CqqV2VGjTIij/o7/fe9o+dUZKp yJN3My/k3Q== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251001080006 20250917063006 23954 nic.cz. eUc03eACoGGNt3Lgyx2oPXSdUytqne2a1/MnRxOhn96DQLyCNDfmQtFFreXBd3V+zdWb8uv9zgLA pGiQI3Or3g== ) ;; { "EDNS-VERSION": 0 }
	nic.cz A RR has value 217.31.205.50
	Found 1 RRSIGs over A RRset
	`nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== )`
	RRSIG=23954 and DNSKEY=23954 verifies the A RRset

nic.cz

	Query to b.ns.nic.cz for nic.cz/A
	Received 153 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 153 octets ;; HEADER SECTION ;; id = 44688 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	b.ns.nic.cz is authoritative for nic.cz
	Found RRSIG signed by nic.cz zone
	Query to b.ns.nic.cz for nic.cz/A
	Received 153 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 153 octets ;; HEADER SECTION ;; id = 51381 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; nic.cz. IN A ;; ANSWER SECTION (2 records) nic.cz. 1800 IN A 217.31.205.50 nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	nic.cz A RR has value 217.31.205.50
	Found 1 RRSIGs over A RRset
	`nic.cz. 1800 IN RRSIG ( A 13 2 1800 20251001074536 20250917061536 23954 nic.cz. +RRSCqdEU/3w7aJt06m7tpdjNV78wmPNftgoSop9p1lKRZe8zeGX0/y/oJjwcoDWYF8cEqzMLQaE gnxro9J4cg== )`
	RRSIG=23954 and DNSKEY=23954 verifies the A RRset

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