DNSSEC Debugger

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Time: 2026-07-21 13:00:18 UTC

Analyzing DNSSEC problems for nic.cz

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

DS=38696/SHA-256 is now in the chain-of-trust

	Checking DS between Trust Anchor and .
	`. IN DS ( 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d )`
	`. IN DS ( 38696 8 2 683d2d0acb8c9b712a1948b27f741219298d0a450d612c483af444a4c0fb2b16 )`
	Query to m.root-servers.net for ./DNSKEY
	Received 1141 bytes from 202.12.27.33
	;; Response received from [202.12.27.33] 1141 octets ;; HEADER SECTION ;; id = 20656 ;; 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 = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (4 records) . 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696 . 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 ( 256 3 8 AwEAAeCYD6Z7WWKVLeuWgowKP+3g+Gs1cnLKq7a3CaQxQpv8bfuFVI0WnG33qaSH/Mw9IBgifrdz f4XY/DQLnyBJ9MfaOyAWuEaEmYJ+GQPiwVVfstGwSA1McfFJUttTgq2Huu74KARhtA8wPo/N3Xcy YQtNhz+qCM5NBb3ecx/naw6sYab9LxS6f2cU0q03++BP5Ks0Uef8WJCa/1izCYE+vMkwoltV+tEN a3hpXiZ7jle/xdgaZrPi5ZGmyLVI34g1XVYrNlsCCTmNvFQIfzW5STFQFsQpizczyFn9r3LzSxxP CNwdlCG84bER0BmdwqbF6Tanv+FxMOavrahkj4wIy5k= ) ; keytag 57780 . 172800 IN RRSIG ( DNSKEY 8 0 172800 20260811000000 20260721000000 20326 . KRNkneCiUAW/3xsn8/6VDpfjYsXUrh19hqxVi2TRYnqbNa9N/fwN0Z/JgTGfigaY6KKSFgTZGZsi ilMiPVdHOirETIVs37XWU6L+dskCttC2rHUShOxnf0lLzy2rFJbolkd3aB5FpbprKmURCyeW/Na/ wtrSCo1kArBAIOGZLHNvDOVKL/MDIAkZJQ6EbfLxY8wkd4Rp93T5sAUyBaSlRpkqDyujUuz/0lCB eApRp0wMGQGC5+3//rdv16be3O5+oi124vJqlskvDw/jIsq3GY2jNjnWBwu7bFeOWHahBsZNROj0 fKTkCYgtWKZfwFp0bwc20chK6hHxPskKEB+AFw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for .
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696`
	`. 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 ( 256 3 8 AwEAAeCYD6Z7WWKVLeuWgowKP+3g+Gs1cnLKq7a3CaQxQpv8bfuFVI0WnG33qaSH/Mw9IBgifrdz f4XY/DQLnyBJ9MfaOyAWuEaEmYJ+GQPiwVVfstGwSA1McfFJUttTgq2Huu74KARhtA8wPo/N3Xcy YQtNhz+qCM5NBb3ecx/naw6sYab9LxS6f2cU0q03++BP5Ks0Uef8WJCa/1izCYE+vMkwoltV+tEN a3hpXiZ7jle/xdgaZrPi5ZGmyLVI34g1XVYrNlsCCTmNvFQIfzW5STFQFsQpizczyFn9r3LzSxxP CNwdlCG84bER0BmdwqbF6Tanv+FxMOavrahkj4wIy5k= ) ; keytag 57780`
	DNSKEY=38696/SEP is now in the chain-of-trust
	DS=38696/SHA-256 verifies DNSKEY=38696/SEP
	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 20260811000000 20260721000000 20326 . KRNkneCiUAW/3xsn8/6VDpfjYsXUrh19hqxVi2TRYnqbNa9N/fwN0Z/JgTGfigaY6KKSFgTZGZsi ilMiPVdHOirETIVs37XWU6L+dskCttC2rHUShOxnf0lLzy2rFJbolkd3aB5FpbprKmURCyeW/Na/ wtrSCo1kArBAIOGZLHNvDOVKL/MDIAkZJQ6EbfLxY8wkd4Rp93T5sAUyBaSlRpkqDyujUuz/0lCB eApRp0wMGQGC5+3//rdv16be3O5+oi124vJqlskvDw/jIsq3GY2jNjnWBwu7bFeOWHahBsZNROj0 fKTkCYgtWKZfwFp0bwc20chK6hHxPskKEB+AFw== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=57780 is now in the chain-of-trust
	Query to c.root-servers.net for nic.cz/A
	Received 613 bytes from 192.33.4.12
	;; Response received from [192.33.4.12] 613 octets ;; HEADER SECTION ;; id = 37873 ;; 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 c.ns.nic.cz. cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS b.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 20260803050000 20260721040000 57780 . XrOLMp/X9iZ0Y0c1r6GStDGRuyLlhA5oed13q5msTIQ28+p/w9KkWNJ5R/BzSlT8zNMW5A0yKn0I gQlAYkc71tkdFZYakZODSXNji3Y6yJJtkuzd4bp9Sx4JtseZ196ZVdXFkG+VstvaTRlrZpxq/ycO 7gXy+n/LlA4FpC3dcDVWXPtRZCm+nM6DOzWTPjZnj7/eqplR0vdJ/gw+RMrmOE4zMmegBrebnXnA lujaNiTiLXDt6FDmO4mtRnI5l06vGU7jiYv0jo71p/cHBMRqxeir5sJN7avNjACcZNAivUSOPZzR tJdYMpM286tiDREKm1lGHhFJ/2KkgsoQMoRBcg== ) ;; ADDITIONAL SECTION (9 records) a.ns.nic.cz. 172800 IN A 194.0.12.1 b.ns.nic.cz. 172800 IN A 194.0.13.1 c.ns.nic.cz. 172800 IN A 194.0.14.1 d.ns.nic.cz. 172800 IN A 193.29.206.1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 ;; { "EDNS-VERSION": 0 }
	Query to l.root-servers.net for cz/DNSKEY
	Received 613 bytes from 199.7.83.42
	;; Response received from [199.7.83.42] 613 octets ;; HEADER SECTION ;; id = 26518 ;; 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": 4096, ;; "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 20260803050000 20260721040000 57780 . XrOLMp/X9iZ0Y0c1r6GStDGRuyLlhA5oed13q5msTIQ28+p/w9KkWNJ5R/BzSlT8zNMW5A0yKn0I gQlAYkc71tkdFZYakZODSXNji3Y6yJJtkuzd4bp9Sx4JtseZ196ZVdXFkG+VstvaTRlrZpxq/ycO 7gXy+n/LlA4FpC3dcDVWXPtRZCm+nM6DOzWTPjZnj7/eqplR0vdJ/gw+RMrmOE4zMmegBrebnXnA lujaNiTiLXDt6FDmO4mtRnI5l06vGU7jiYv0jo71p/cHBMRqxeir5sJN7avNjACcZNAivUSOPZzR tJdYMpM286tiDREKm1lGHhFJ/2KkgsoQMoRBcg== ) ;; ADDITIONAL SECTION (9 records) a.ns.nic.cz. 172800 IN A 194.0.12.1 b.ns.nic.cz. 172800 IN A 194.0.13.1 c.ns.nic.cz. 172800 IN A 194.0.14.1 d.ns.nic.cz. 172800 IN A 193.29.206.1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::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 f.root-servers.net for cz/DS
	Received 366 bytes from 192.5.5.241
	;; Response received from [192.5.5.241] 366 octets ;; HEADER SECTION ;; id = 16863 ;; 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 20260803050000 20260721040000 57780 . XrOLMp/X9iZ0Y0c1r6GStDGRuyLlhA5oed13q5msTIQ28+p/w9KkWNJ5R/BzSlT8zNMW5A0yKn0I gQlAYkc71tkdFZYakZODSXNji3Y6yJJtkuzd4bp9Sx4JtseZ196ZVdXFkG+VstvaTRlrZpxq/ycO 7gXy+n/LlA4FpC3dcDVWXPtRZCm+nM6DOzWTPjZnj7/eqplR0vdJ/gw+RMrmOE4zMmegBrebnXnA lujaNiTiLXDt6FDmO4mtRnI5l06vGU7jiYv0jo71p/cHBMRqxeir5sJN7avNjACcZNAivUSOPZzR tJdYMpM286tiDREKm1lGHhFJ/2KkgsoQMoRBcg== ) ;; 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 20260803050000 20260721040000 57780 . XrOLMp/X9iZ0Y0c1r6GStDGRuyLlhA5oed13q5msTIQ28+p/w9KkWNJ5R/BzSlT8zNMW5A0yKn0I gQlAYkc71tkdFZYakZODSXNji3Y6yJJtkuzd4bp9Sx4JtseZ196ZVdXFkG+VstvaTRlrZpxq/ycO 7gXy+n/LlA4FpC3dcDVWXPtRZCm+nM6DOzWTPjZnj7/eqplR0vdJ/gw+RMrmOE4zMmegBrebnXnA lujaNiTiLXDt6FDmO4mtRnI5l06vGU7jiYv0jo71p/cHBMRqxeir5sJN7avNjACcZNAivUSOPZzR tJdYMpM286tiDREKm1lGHhFJ/2KkgsoQMoRBcg== )`
	RRSIG=57780 and DNSKEY=57780 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 b.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 289 octets ;; HEADER SECTION ;; id = 8002 ;; 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 2ERsMpzuik4l6EOn2Q1qU9oAL9+ZPiAOgMI//O0RCbRPorAgBCnMD852riPDYJ0ll0qGMM/babEF IHzPYFj98g== ) ; keytag 31683 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20260801083406 20260718070406 20237 cz. FsEG74qLtNYFzvL8gH8OG6YaKTpvQqjGPLepixXU93CX+D2qgSV1zEB/nLrXzclk08iq05p8QxNY q4tDCT//gw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 2ERsMpzuik4l6EOn2Q1qU9oAL9+ZPiAOgMI//O0RCbRPorAgBCnMD852riPDYJ0ll0qGMM/babEF IHzPYFj98g== ) ; keytag 31683`
	`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 20260801083406 20260718070406 20237 cz. FsEG74qLtNYFzvL8gH8OG6YaKTpvQqjGPLepixXU93CX+D2qgSV1zEB/nLrXzclk08iq05p8QxNY q4tDCT//gw== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=31683 is now in the chain-of-trust
	Query to d.ns.nic.cz for nic.cz/A
	Received 1050 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 1050 octets ;; HEADER SECTION ;; id = 16797 ;; 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 20260728235554 20260714222554 58804 nic.cz. xTIXDLbHQ5vswCwqQ4Ajo0gxYoeLeJwmlm118/jwHdG9694/zZ/CSZQ+hwCyo0AaNCn0Hf/5kaN9 XIOpAQvUQg== ) ;; AUTHORITY SECTION (4 records) nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN NS b.ns.nic.cz. nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20260728235554 20260714222554 58804 nic.cz. GFNKEW+ERPqycTwcpGWf+BYjYUJwnMB8v2Zkvp9XnxOogj4tJBT9LJtgSgFE2b4CD3pPFLPGTWTI TuhNsMCu9g== ) ;; 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 20260728235554 20260714222554 58804 nic.cz. maRuiSFZTtQXECwFbOcbsBm0FH0X2UpuNrdr9klN3p042Td8qbROE9JT+QBMBJFSe576jHnUS4P/ 5uSG9zXfrw== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260728235554 20260714222554 58804 nic.cz. Bj4Ggz3YCMOlLRgT8h9Cwi33VSHfRSuAi8GuqEM3N+JBy3bsMpfoBPgcnY6GVlonaTBruQdjZAxI Ge7/nukF9g== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260728235554 20260714222554 58804 nic.cz. uQz+TlGOgIM7OakI/akkFjKn6pFF5NLAC9JSB06XKjmku4JFt1fyn2OejuwE9KCxZQs5V9epFVDQ DfZgeGkbxw== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260728235554 20260714222554 58804 nic.cz. xWAnqVHcmxUY+7mri6OL+bvWuABt1Ynm5a6g8Kksg4j9CmsaCI3bPnulhLFUD0yQbp5a2mtXRwU+ lNoOOY6i+Q== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260728235554 20260714222554 58804 nic.cz. 40hPEYZiawGCXXljlnSdZPlAaky4NZ32eY365xf8lttLl/SRURoNINAMEUe6upDcoQwXuGHJ+u+y gRQtqA7JAQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260728235554 20260714222554 58804 nic.cz. xV7weXuUlWUr1NqpWxoKH2jXRBMOJ8IOnepbL9HmrrOQUkZ/91x7Eqc25zGWJTSHaiy+9k8Kn0TG 4eSZ90A9MQ== ) ;; { "EDNS-VERSION": 0 }
	d.ns.nic.cz is authoritative for nic.cz
	Query to a.ns.nic.cz for nic.cz/DNSKEY
	Received 297 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 297 octets ;; HEADER SECTION ;; id = 58981 ;; 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 emrBwf0RmCyZ75GvAJZTnJclVUN2LFdfhtu5GqnXNSR8MJ2RoWdTHALyHoSt0SBS1xFrPHkUun/K mSOXIvIynw== ) ; keytag 58804 nic.cz. 1800 IN DNSKEY ( 257 3 13 k7hKKwT81lAZq/ll8elwYcxYLsWBaWUIQyeS7E0ENiszjlujM7JouKGZZPnchh/dJ8+pJaRT6XTd 7zoTn+Uh6A== ) ; keytag 54415 nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20260729012554 20260714235554 54415 nic.cz. LgDbMGiHeiKoFIzl4cDXvzkOD4tHIz0s3FQphQZ2Mtnb//In3UnNg9PX+Zg3432sNblRZ8lA15Oq DCKT85wKww== ) ;; 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 c.ns.nic.cz for nic.cz/NS
	Received 932 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 932 octets ;; HEADER SECTION ;; id = 64489 ;; 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 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 20260728235554 20260714222554 58804 nic.cz. GFNKEW+ERPqycTwcpGWf+BYjYUJwnMB8v2Zkvp9XnxOogj4tJBT9LJtgSgFE2b4CD3pPFLPGTWTI TuhNsMCu9g== ) ;; 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 20260728235554 20260714222554 58804 nic.cz. maRuiSFZTtQXECwFbOcbsBm0FH0X2UpuNrdr9klN3p042Td8qbROE9JT+QBMBJFSe576jHnUS4P/ 5uSG9zXfrw== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260728235554 20260714222554 58804 nic.cz. Bj4Ggz3YCMOlLRgT8h9Cwi33VSHfRSuAi8GuqEM3N+JBy3bsMpfoBPgcnY6GVlonaTBruQdjZAxI Ge7/nukF9g== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260728235554 20260714222554 58804 nic.cz. uQz+TlGOgIM7OakI/akkFjKn6pFF5NLAC9JSB06XKjmku4JFt1fyn2OejuwE9KCxZQs5V9epFVDQ DfZgeGkbxw== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260728235554 20260714222554 58804 nic.cz. xWAnqVHcmxUY+7mri6OL+bvWuABt1Ynm5a6g8Kksg4j9CmsaCI3bPnulhLFUD0yQbp5a2mtXRwU+ lNoOOY6i+Q== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260728235554 20260714222554 58804 nic.cz. 40hPEYZiawGCXXljlnSdZPlAaky4NZ32eY365xf8lttLl/SRURoNINAMEUe6upDcoQwXuGHJ+u+y gRQtqA7JAQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260728235554 20260714222554 58804 nic.cz. xV7weXuUlWUr1NqpWxoKH2jXRBMOJ8IOnepbL9HmrrOQUkZ/91x7Eqc25zGWJTSHaiy+9k8Kn0TG 4eSZ90A9MQ== ) ;; { "EDNS-VERSION": 0 }
	Found nic.cz nameservers: d.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz

nic.cz

	Checking DS between cz and nic.cz
	Query to a.ns.nic.cz for nic.cz/DS
	Received 181 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 181 octets ;; HEADER SECTION ;; id = 47191 ;; 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 ( 54415 13 2 802cdcd1b7d55ce64e41e837a741f7f376e03883f425cc8d5652ee93f1403ff9 ) nic.cz. 3600 IN RRSIG ( DS 13 2 3600 20260725171722 20260711154722 31683 cz. W56lkYQ/pSOVT2XzamfWWEkS7UTHDkXj/CgeDTc5S3HE37BN83ax/kmAf3Z77ijmeiOl3pvBIDYs YTu2esrrRQ== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for nic.cz in the cz zone
	DS=54415/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`nic.cz. 3600 IN RRSIG ( DS 13 2 3600 20260725171722 20260711154722 31683 cz. W56lkYQ/pSOVT2XzamfWWEkS7UTHDkXj/CgeDTc5S3HE37BN83ax/kmAf3Z77ijmeiOl3pvBIDYs YTu2esrrRQ== )`
	RRSIG=31683 and DNSKEY=31683 verifies the DS RRset
	DS=54415/SHA-256 is now in the chain-of-trust
	`nic.cz. 3600 IN DS ( 54415 13 2 802cdcd1b7d55ce64e41e837a741f7f376e03883f425cc8d5652ee93f1403ff9 )`
	Query to a.ns.nic.cz for nic.cz/DNSKEY
	Found 2 DNSKEY records for nic.cz
	`nic.cz. 1800 IN DNSKEY ( 256 3 13 emrBwf0RmCyZ75GvAJZTnJclVUN2LFdfhtu5GqnXNSR8MJ2RoWdTHALyHoSt0SBS1xFrPHkUun/K mSOXIvIynw== ) ; keytag 58804`
	`nic.cz. 1800 IN DNSKEY ( 257 3 13 k7hKKwT81lAZq/ll8elwYcxYLsWBaWUIQyeS7E0ENiszjlujM7JouKGZZPnchh/dJ8+pJaRT6XTd 7zoTn+Uh6A== ) ; keytag 54415`
	DNSKEY=54415/SEP is now in the chain-of-trust
	DS=54415/SHA-256 verifies DNSKEY=54415/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20260729012554 20260714235554 54415 nic.cz. LgDbMGiHeiKoFIzl4cDXvzkOD4tHIz0s3FQphQZ2Mtnb//In3UnNg9PX+Zg3432sNblRZ8lA15Oq DCKT85wKww== )`
	RRSIG=54415 and DNSKEY=54415/SEP verifies the DNSKEY RRset
	DNSKEY=58804 is now in the chain-of-trust
	Query to d.ns.nic.cz for nic.cz/A
	d.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 = 9667 ;; 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. 1784633203 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20260804112643 20260721095643 58804 nic.cz. FuYf3FHWJ92IIPizoCjThA5BiKUS11E5gSdXo/ZTCfj+DeOS4KO3+DeZhSLC8zQrEmfmVYM/FlLt 6dnqr41ZHA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Query to a.ns.nic.cz for nic.cz/SOA
	Received 189 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 189 octets ;; HEADER SECTION ;; id = 33924 ;; 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. 1784633203 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20260804112643 20260721095643 58804 nic.cz. FuYf3FHWJ92IIPizoCjThA5BiKUS11E5gSdXo/ZTCfj+DeOS4KO3+DeZhSLC8zQrEmfmVYM/FlLt 6dnqr41ZHA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Query to d.ns.nic.cz for nic.cz/A
	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 20260728235554 20260714222554 58804 nic.cz. xTIXDLbHQ5vswCwqQ4Ajo0gxYoeLeJwmlm118/jwHdG9694/zZ/CSZQ+hwCyo0AaNCn0Hf/5kaN9 XIOpAQvUQg== )`
	RRSIG=58804 and DNSKEY=58804 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 = 25891 ;; 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 20260728235554 20260714222554 58804 nic.cz. xTIXDLbHQ5vswCwqQ4Ajo0gxYoeLeJwmlm118/jwHdG9694/zZ/CSZQ+hwCyo0AaNCn0Hf/5kaN9 XIOpAQvUQg== ) ;; 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
	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 20260728235554 20260714222554 58804 nic.cz. xTIXDLbHQ5vswCwqQ4Ajo0gxYoeLeJwmlm118/jwHdG9694/zZ/CSZQ+hwCyo0AaNCn0Hf/5kaN9 XIOpAQvUQg== )`
	RRSIG=58804 and DNSKEY=58804 verifies the A RRset

nic.cz

	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 = 1031 ;; 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 20260728235554 20260714222554 58804 nic.cz. xTIXDLbHQ5vswCwqQ4Ajo0gxYoeLeJwmlm118/jwHdG9694/zZ/CSZQ+hwCyo0AaNCn0Hf/5kaN9 XIOpAQvUQg== ) ;; 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 a.ns.nic.cz for nic.cz/A
	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 20260728235554 20260714222554 58804 nic.cz. xTIXDLbHQ5vswCwqQ4Ajo0gxYoeLeJwmlm118/jwHdG9694/zZ/CSZQ+hwCyo0AaNCn0Hf/5kaN9 XIOpAQvUQg== )`
	RRSIG=58804 and DNSKEY=58804 verifies the A RRset

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