DNSSEC Debugger

Domain Name:

Time: 2025-07-12 06:16:37 UTC

Analyzing DNSSEC problems for cvut.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 a.root-servers.net for ./DNSKEY
	Received 1414 bytes from 198.41.0.4
	;; Response received from [198.41.0.4] 1414 octets ;; HEADER SECTION ;; id = 45193 ;; 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": 4096, ;; "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 20250801000000 20250711000000 20326 . WwWSfJzdfRVlUhGNEnrahgVWN54iU6fIm3g0XhxC1f3yxbK7s1iQFZpKwJ0xNQkBeBFA0/sb7N4D nZVn1gdF9F8oOQ5sDllyjewNoDjAgtyN+inLgl9Ta/aK1Tn183K0P0jevWG8MmbIC8TCmbv/SvyD TZK3BIMsQ+HGu8jloGYgIgbliKrG14GtXcF2jcjLFaIT7J1j1pO1ErcUrgd7hmfEC9emCZbDuQAt RQ+mWJL9NNTj6RToAUxA8sI4kEgrslBAzzc6co7TbhediJ/2ya1in+nLTCBHV53oL1JGITWaGwMf lcDwQEkWFJ0dRxhNDkKvuDCRz3VnPaAkDPLrbA== ) ;; 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 20250801000000 20250711000000 20326 . WwWSfJzdfRVlUhGNEnrahgVWN54iU6fIm3g0XhxC1f3yxbK7s1iQFZpKwJ0xNQkBeBFA0/sb7N4D nZVn1gdF9F8oOQ5sDllyjewNoDjAgtyN+inLgl9Ta/aK1Tn183K0P0jevWG8MmbIC8TCmbv/SvyD TZK3BIMsQ+HGu8jloGYgIgbliKrG14GtXcF2jcjLFaIT7J1j1pO1ErcUrgd7hmfEC9emCZbDuQAt RQ+mWJL9NNTj6RToAUxA8sI4kEgrslBAzzc6co7TbhediJ/2ya1in+nLTCBHV53oL1JGITWaGwMf lcDwQEkWFJ0dRxhNDkKvuDCRz3VnPaAkDPLrbA== )`
	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 m.root-servers.net for cvut.cz/A
	Received 620 bytes from 202.12.27.33
	;; Response received from [202.12.27.33] 620 octets ;; HEADER SECTION ;; id = 10438 ;; 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) ;; cvut.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS d.ns.nic.cz. 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. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250725050000 20250712040000 46441 . ByoO5yua4uB8xhfFNQnEd3BdzjyLkB4OPCuLcsIZOe9q0A3A2Lg1VrIc2muf22w72Q3IrAVRAnPT nzcfFjQo19uqDkdbeMwiyWfoTSSmEJmggG3VIAgYmQ7ggMPMgpMykmovCZmsvHJaALGSTwmHm2oi Ja6AI3BaRuuFsdAmazfqcqT0lVDW18BF8skAvU2YKyt6KbT4833Dt4HTqwRAKtuy3mdLArnFkH4e uvifGcVxYNdgQfVfbdwQbeeyGB56UOdsqpgkDXn58VzxlcbwiLohMVCw0/2IaGkQTeYQX0sUi0qC EQmGYZgNtF7ByaJ4L96S6dHQivJScJyljtueMA== ) ;; ADDITIONAL SECTION (9 records) d.ns.nic.cz. 172800 IN A 193.29.206.1 c.ns.nic.cz. 172800 IN A 194.0.14.1 b.ns.nic.cz. 172800 IN A 194.0.13.1 a.ns.nic.cz. 172800 IN A 194.0.12.1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 ;; { "EDNS-VERSION": 0 }
	Query to k.root-servers.net for cz/DNSKEY
	Received 613 bytes from 193.0.14.129
	;; Response received from [193.0.14.129] 613 octets ;; HEADER SECTION ;; id = 53236 ;; 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) ;; 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 20250725050000 20250712040000 46441 . ByoO5yua4uB8xhfFNQnEd3BdzjyLkB4OPCuLcsIZOe9q0A3A2Lg1VrIc2muf22w72Q3IrAVRAnPT nzcfFjQo19uqDkdbeMwiyWfoTSSmEJmggG3VIAgYmQ7ggMPMgpMykmovCZmsvHJaALGSTwmHm2oi Ja6AI3BaRuuFsdAmazfqcqT0lVDW18BF8skAvU2YKyt6KbT4833Dt4HTqwRAKtuy3mdLArnFkH4e uvifGcVxYNdgQfVfbdwQbeeyGB56UOdsqpgkDXn58VzxlcbwiLohMVCw0/2IaGkQTeYQX0sUi0qC EQmGYZgNtF7ByaJ4L96S6dHQivJScJyljtueMA== ) ;; 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 g.root-servers.net for cz/DS
	Received 366 bytes from 192.112.36.4
	;; Response received from [192.112.36.4] 366 octets ;; HEADER SECTION ;; id = 7132 ;; 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) ;; cz. IN DS ;; ANSWER SECTION (2 records) cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250725050000 20250712040000 46441 . ByoO5yua4uB8xhfFNQnEd3BdzjyLkB4OPCuLcsIZOe9q0A3A2Lg1VrIc2muf22w72Q3IrAVRAnPT nzcfFjQo19uqDkdbeMwiyWfoTSSmEJmggG3VIAgYmQ7ggMPMgpMykmovCZmsvHJaALGSTwmHm2oi Ja6AI3BaRuuFsdAmazfqcqT0lVDW18BF8skAvU2YKyt6KbT4833Dt4HTqwRAKtuy3mdLArnFkH4e uvifGcVxYNdgQfVfbdwQbeeyGB56UOdsqpgkDXn58VzxlcbwiLohMVCw0/2IaGkQTeYQX0sUi0qC EQmGYZgNtF7ByaJ4L96S6dHQivJScJyljtueMA== ) ;; 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 20250725050000 20250712040000 46441 . ByoO5yua4uB8xhfFNQnEd3BdzjyLkB4OPCuLcsIZOe9q0A3A2Lg1VrIc2muf22w72Q3IrAVRAnPT nzcfFjQo19uqDkdbeMwiyWfoTSSmEJmggG3VIAgYmQ7ggMPMgpMykmovCZmsvHJaALGSTwmHm2oi Ja6AI3BaRuuFsdAmazfqcqT0lVDW18BF8skAvU2YKyt6KbT4833Dt4HTqwRAKtuy3mdLArnFkH4e uvifGcVxYNdgQfVfbdwQbeeyGB56UOdsqpgkDXn58VzxlcbwiLohMVCw0/2IaGkQTeYQX0sUi0qC EQmGYZgNtF7ByaJ4L96S6dHQivJScJyljtueMA== )`
	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 = 34848 ;; 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 fOZu5UZiFvWPhFuxvHbFbpdMGukUkQd2E8xAC3Z8GVmHklwkP8rDqR2YJm7hrOVvXD/eWA0HhyLn 5rUDz8IJWg== ) ; keytag 41804 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20250721082134 20250707065134 20237 cz. AyFdaQ/lp1bQKJ/ZJkAoYwpCSYCJ9bemtNaHVTehgkSbGdSAFbimh1VyffTE6bRp4w0YYKTSWMts VE0yiEsGtA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 fOZu5UZiFvWPhFuxvHbFbpdMGukUkQd2E8xAC3Z8GVmHklwkP8rDqR2YJm7hrOVvXD/eWA0HhyLn 5rUDz8IJWg== ) ; keytag 41804`
	`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 20250721082134 20250707065134 20237 cz. AyFdaQ/lp1bQKJ/ZJkAoYwpCSYCJ9bemtNaHVTehgkSbGdSAFbimh1VyffTE6bRp4w0YYKTSWMts VE0yiEsGtA== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=41804 is now in the chain-of-trust
	Query to c.ns.nic.cz for cvut.cz/A
	Received 305 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 305 octets ;; HEADER SECTION ;; id = 8536 ;; 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 = 4 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (4 records) cvut.cz. 3600 IN NS ns.cvut.cz. cvut.cz. 3600 IN NS nss.cvut.cz. cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20250714062134 20250630045134 41804 cz. tbUVKA6iQB6nTn8ymHyyL0EcWC7AcJQM1ZmOHl6N5onpvEpS2cbaCVknbg1AJmqkNbOIx1u/UYxz ikbxFtv1lA== ) ;; ADDITIONAL SECTION (5 records) nss.cvut.cz. 3600 IN A 147.32.1.9 ns.cvut.cz. 3600 IN A 147.32.1.20 nss.cvut.cz. 3600 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 3600 IN AAAA 2001:718:2:2200::100 ;; { "EDNS-VERSION": 0 }
	Query to b.ns.nic.cz for cvut.cz/DNSKEY
	Received 305 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 305 octets ;; HEADER SECTION ;; id = 6408 ;; 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 = 4 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (4 records) cvut.cz. 3600 IN NS ns.cvut.cz. cvut.cz. 3600 IN NS nss.cvut.cz. cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20250714062134 20250630045134 41804 cz. tbUVKA6iQB6nTn8ymHyyL0EcWC7AcJQM1ZmOHl6N5onpvEpS2cbaCVknbg1AJmqkNbOIx1u/UYxz ikbxFtv1lA== ) ;; ADDITIONAL SECTION (5 records) ns.cvut.cz. 3600 IN A 147.32.1.20 ns.cvut.cz. 3600 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 3600 IN A 147.32.1.9 nss.cvut.cz. 3600 IN AAAA 2001:718:2:2200::101 ;; { "EDNS-VERSION": 0 }
	Found child zone cvut.cz

cvut.cz

	Checking DS between cz and cvut.cz
	Query to c.ns.nic.cz for cvut.cz/DS
	Received 182 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 182 octets ;; HEADER SECTION ;; id = 35320 ;; 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) ;; cvut.cz. IN DS ;; ANSWER SECTION (2 records) cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20250714062134 20250630045134 41804 cz. tbUVKA6iQB6nTn8ymHyyL0EcWC7AcJQM1ZmOHl6N5onpvEpS2cbaCVknbg1AJmqkNbOIx1u/UYxz ikbxFtv1lA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for cvut.cz in the cz zone
	DS=41860/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20250714062134 20250630045134 41804 cz. tbUVKA6iQB6nTn8ymHyyL0EcWC7AcJQM1ZmOHl6N5onpvEpS2cbaCVknbg1AJmqkNbOIx1u/UYxz ikbxFtv1lA== )`
	RRSIG=41804 and DNSKEY=41804 verifies the DS RRset
	DS=41860/SHA-256 is now in the chain-of-trust
	`cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 )`
	Query to ns.cvut.cz for cvut.cz/DNSKEY
	Received 219 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 219 octets ;; HEADER SECTION ;; id = 42223 ;; 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) ;; cvut.cz. IN DNSKEY ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN DNSKEY ( 257 3 13 +XkJfh9Fh5wGJVpntLyKQRXkrRQhP+kL3lnJ1SQfG3XTjW9WBBknfO37yynPQtat8S+kIuOJZaSg kLmMfS8drQ== ) ; keytag 41860 cvut.cz. 6400 IN RRSIG ( DNSKEY 13 2 6400 20250720165101 20250620163146 41860 cvut.cz. Uo7sW0qhpMta6KW8VEZGNXeleDcRRSyEsRJZShvCdr6hV06HZD409otv/w47ic0nE77TM24FiN3v P/R0y8Bf9Q== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DNSKEY records for cvut.cz
	`cvut.cz. 6400 IN DNSKEY ( 257 3 13 +XkJfh9Fh5wGJVpntLyKQRXkrRQhP+kL3lnJ1SQfG3XTjW9WBBknfO37yynPQtat8S+kIuOJZaSg kLmMfS8drQ== ) ; keytag 41860`
	DNSKEY=41860/SEP is now in the chain-of-trust
	DS=41860/SHA-256 verifies DNSKEY=41860/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`cvut.cz. 6400 IN RRSIG ( DNSKEY 13 2 6400 20250720165101 20250620163146 41860 cvut.cz. Uo7sW0qhpMta6KW8VEZGNXeleDcRRSyEsRJZShvCdr6hV06HZD409otv/w47ic0nE77TM24FiN3v P/R0y8Bf9Q== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the DNSKEY RRset
	Query to nss.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.9
	;; Response received from [147.32.1.9] 793 octets ;; HEADER SECTION ;; id = 31716 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. HKemzcu1IkOeelMOSWi19ud/EbMKnnxuplw3LwZJKu5weqHm7+bDeDbnvZT8rm/vzTtcP8jG3htp +i3y/SlGyA== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. Na1hTCYLneKPM8ZL4Po3vm0KtxRptuIuMwhUyeNSvef6LEM/oal2IqY2ocjnzzaj27v+KEHBivE6 mUjZq2tk4g== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. XMsMYEqmUmPAP8/XY8a4huulFayysaWXUnLcQNV7N3UTFdWhlrGyZmWNcWS9h0aMt9opG1oBCiTx XmIKmNUBhw== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. uXaLesHQI0l8ldHn22+AiFX/IY4b+M1A0TVt+vm3jI6Ks5N9dYgrjh+7Eqy10pI72m0eBceC5WZd O5Wmw1z7Fg== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. doxyicNUUnIFKIb0ZpnsRJ+h1HvbOhq92nmZrLcDWDxBgN4OkNLKMnOfos4jl4oQD1MiaM/FXIfj IGhKh96ePQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. 0PH9/mT0IUJj/MwLr0L5sD71mFscdwZlJ9Em1NxvZs9PBaOd4MGkxV0pCurhgzMxYPZ/8N941veX dE9fTdpirQ== ) ;; { "EDNS-VERSION": 0 }
	nss.cvut.cz is authoritative for cvut.cz
	Found RRSIG signed by cvut.cz zone
	Query to ns.cvut.cz for cvut.cz/SOA
	Received 824 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 824 octets ;; HEADER SECTION ;; id = 1153 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN SOA ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN SOA ( ns.cvut.cz. hostmaster.cvut.cz. 10320 ;serial 14401 ;refresh 3600 ;retry 1209600 ;expire 86400 ;minimum ) cvut.cz. 6400 IN RRSIG ( SOA 13 2 6400 20250811023322 20250712013322 41860 cvut.cz. r7w1qAnalzwvkrZVII9TuXXpDHr5qkDyClNU9ujaDEcitjR6oCfk0j8jaTZrIKb2x4qcv+8Wqr0S F8o3RMqroQ== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. Na1hTCYLneKPM8ZL4Po3vm0KtxRptuIuMwhUyeNSvef6LEM/oal2IqY2ocjnzzaj27v+KEHBivE6 mUjZq2tk4g== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. XMsMYEqmUmPAP8/XY8a4huulFayysaWXUnLcQNV7N3UTFdWhlrGyZmWNcWS9h0aMt9opG1oBCiTx XmIKmNUBhw== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. uXaLesHQI0l8ldHn22+AiFX/IY4b+M1A0TVt+vm3jI6Ks5N9dYgrjh+7Eqy10pI72m0eBceC5WZd O5Wmw1z7Fg== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. doxyicNUUnIFKIb0ZpnsRJ+h1HvbOhq92nmZrLcDWDxBgN4OkNLKMnOfos4jl4oQD1MiaM/FXIfj IGhKh96ePQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. 0PH9/mT0IUJj/MwLr0L5sD71mFscdwZlJ9Em1NxvZs9PBaOd4MGkxV0pCurhgzMxYPZ/8N941veX dE9fTdpirQ== ) ;; { "EDNS-VERSION": 0 }
	Query to nss.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.9
	;; Response received from [147.32.1.9] 793 octets ;; HEADER SECTION ;; id = 56161 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. HKemzcu1IkOeelMOSWi19ud/EbMKnnxuplw3LwZJKu5weqHm7+bDeDbnvZT8rm/vzTtcP8jG3htp +i3y/SlGyA== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. Na1hTCYLneKPM8ZL4Po3vm0KtxRptuIuMwhUyeNSvef6LEM/oal2IqY2ocjnzzaj27v+KEHBivE6 mUjZq2tk4g== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. XMsMYEqmUmPAP8/XY8a4huulFayysaWXUnLcQNV7N3UTFdWhlrGyZmWNcWS9h0aMt9opG1oBCiTx XmIKmNUBhw== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. uXaLesHQI0l8ldHn22+AiFX/IY4b+M1A0TVt+vm3jI6Ks5N9dYgrjh+7Eqy10pI72m0eBceC5WZd O5Wmw1z7Fg== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. doxyicNUUnIFKIb0ZpnsRJ+h1HvbOhq92nmZrLcDWDxBgN4OkNLKMnOfos4jl4oQD1MiaM/FXIfj IGhKh96ePQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. 0PH9/mT0IUJj/MwLr0L5sD71mFscdwZlJ9Em1NxvZs9PBaOd4MGkxV0pCurhgzMxYPZ/8N941veX dE9fTdpirQ== ) ;; { "EDNS-VERSION": 0 }
	cvut.cz A RR has value 147.32.3.202
	Found 1 RRSIGs over A RRset
	`cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. HKemzcu1IkOeelMOSWi19ud/EbMKnnxuplw3LwZJKu5weqHm7+bDeDbnvZT8rm/vzTtcP8jG3htp +i3y/SlGyA== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the A RRset

cvut.cz

	Query to ns.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 793 octets ;; HEADER SECTION ;; id = 13684 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. HKemzcu1IkOeelMOSWi19ud/EbMKnnxuplw3LwZJKu5weqHm7+bDeDbnvZT8rm/vzTtcP8jG3htp +i3y/SlGyA== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. Na1hTCYLneKPM8ZL4Po3vm0KtxRptuIuMwhUyeNSvef6LEM/oal2IqY2ocjnzzaj27v+KEHBivE6 mUjZq2tk4g== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. XMsMYEqmUmPAP8/XY8a4huulFayysaWXUnLcQNV7N3UTFdWhlrGyZmWNcWS9h0aMt9opG1oBCiTx XmIKmNUBhw== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. uXaLesHQI0l8ldHn22+AiFX/IY4b+M1A0TVt+vm3jI6Ks5N9dYgrjh+7Eqy10pI72m0eBceC5WZd O5Wmw1z7Fg== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. doxyicNUUnIFKIb0ZpnsRJ+h1HvbOhq92nmZrLcDWDxBgN4OkNLKMnOfos4jl4oQD1MiaM/FXIfj IGhKh96ePQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. 0PH9/mT0IUJj/MwLr0L5sD71mFscdwZlJ9Em1NxvZs9PBaOd4MGkxV0pCurhgzMxYPZ/8N941veX dE9fTdpirQ== ) ;; { "EDNS-VERSION": 0 }
	ns.cvut.cz is authoritative for cvut.cz
	Found RRSIG signed by cvut.cz zone
	Query to ns.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 793 octets ;; HEADER SECTION ;; id = 13568 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. HKemzcu1IkOeelMOSWi19ud/EbMKnnxuplw3LwZJKu5weqHm7+bDeDbnvZT8rm/vzTtcP8jG3htp +i3y/SlGyA== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. Na1hTCYLneKPM8ZL4Po3vm0KtxRptuIuMwhUyeNSvef6LEM/oal2IqY2ocjnzzaj27v+KEHBivE6 mUjZq2tk4g== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. XMsMYEqmUmPAP8/XY8a4huulFayysaWXUnLcQNV7N3UTFdWhlrGyZmWNcWS9h0aMt9opG1oBCiTx XmIKmNUBhw== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250729104218 20250629094501 41860 cvut.cz. uXaLesHQI0l8ldHn22+AiFX/IY4b+M1A0TVt+vm3jI6Ks5N9dYgrjh+7Eqy10pI72m0eBceC5WZd O5Wmw1z7Fg== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. doxyicNUUnIFKIb0ZpnsRJ+h1HvbOhq92nmZrLcDWDxBgN4OkNLKMnOfos4jl4oQD1MiaM/FXIfj IGhKh96ePQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20250720100228 20250620093746 41860 cvut.cz. 0PH9/mT0IUJj/MwLr0L5sD71mFscdwZlJ9Em1NxvZs9PBaOd4MGkxV0pCurhgzMxYPZ/8N941veX dE9fTdpirQ== ) ;; { "EDNS-VERSION": 0 }
	cvut.cz A RR has value 147.32.3.202
	Found 1 RRSIGs over A RRset
	`cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20250802135700 20250703133636 41860 cvut.cz. HKemzcu1IkOeelMOSWi19ud/EbMKnnxuplw3LwZJKu5weqHm7+bDeDbnvZT8rm/vzTtcP8jG3htp +i3y/SlGyA== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the A RRset

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