DNSSEC Debugger

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Time: 2026-08-13 09:14:57 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 e.root-servers.net for ./DNSKEY
	Received 1139 bytes from 192.203.230.10
	;; Response received from [192.203.230.10] 1139 octets ;; HEADER SECTION ;; id = 64534 ;; 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": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (4 records) . 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 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 20260831000000 20260810000000 20326 . V78PtBnjcahYNt6ZWnzGlM+EExU9UNP4kRg5NGdsDW8OUHNRWY86PPVrQoWY3uwSbIVxs/mv9XJx oH/NdZm46Amyns74QH6IuPcCk055P1xF8f37JaSzrn+AA9vJCicqH8fnOSG7mSXs6W+or+1tJ5zL Npqjj+IuXyWOcTB0/W3loQYrPxdYIieY2DuSPRmXvpC4Z3LjMnOSvO4Q87V2ayUuPIdhO2w6Ltr3 /k6qRfSnyAcvhomTnf55nzn/Pl3urhbB/sx8VypzJZg/76nLCSxrS4XuDU8ORagQA99GeeuqFgLu fdMhNgr5m/QE6tworB9ptU8CHkhizUgIZxCd4A== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for .
	`. 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 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
	DNSKEY=38696/SEP is now in the chain-of-trust
	DS=38696/SHA-256 verifies DNSKEY=38696/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`. 172800 IN RRSIG ( DNSKEY 8 0 172800 20260831000000 20260810000000 20326 . V78PtBnjcahYNt6ZWnzGlM+EExU9UNP4kRg5NGdsDW8OUHNRWY86PPVrQoWY3uwSbIVxs/mv9XJx oH/NdZm46Amyns74QH6IuPcCk055P1xF8f37JaSzrn+AA9vJCicqH8fnOSG7mSXs6W+or+1tJ5zL Npqjj+IuXyWOcTB0/W3loQYrPxdYIieY2DuSPRmXvpC4Z3LjMnOSvO4Q87V2ayUuPIdhO2w6Ltr3 /k6qRfSnyAcvhomTnf55nzn/Pl3urhbB/sx8VypzJZg/76nLCSxrS4XuDU8ORagQA99GeeuqFgLu fdMhNgr5m/QE6tworB9ptU8CHkhizUgIZxCd4A== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=57780 is now in the chain-of-trust
	Query to a.root-servers.net for nic.cz/A
	Received 613 bytes from 198.41.0.4
	;; Response received from [198.41.0.4] 613 octets ;; HEADER SECTION ;; id = 49189 ;; 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) ;; nic.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS c.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 20260826050000 20260813040000 57780 . w3sauwPKie2ufgojudmXO2oGKtfluDpgCa4c3B3Kdu0Mh0OtUcLz0T6b9BmFgju9gAww0mltH2vs RdmzIowugmSeJZm0+ujwbs9++yaycaRW/nIFGgOc5XZAHbcDDPVM5KKZG7ZXsXwBm3ha1Pn8PnzJ nbuhTzW5OZONhuZSuwI3B6+dm8rCiOgBYC1YJtCveAhxaEVaaIEWLkrI6PY0fGrZlYyonTtywymf c4nsjtFVPvnrLF1YcXLfle8kvBqDi8rDD37KjVQI9UyKPcXE8kUaCr7eLOI2y2Pb8K5kWBlyWzq7 09NEOqfbhq5Ki7DaneAuChF2MgRCRLAOqWck8g== ) ;; 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 c.ns.nic.cz. 172800 IN A 194.0.14.1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 b.ns.nic.cz. 172800 IN A 194.0.13.1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::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 c.root-servers.net for cz/DNSKEY
	Received 613 bytes from 192.33.4.12
	;; Response received from [192.33.4.12] 613 octets ;; HEADER SECTION ;; id = 38486 ;; 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 d.ns.nic.cz. 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. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20260826050000 20260813040000 57780 . w3sauwPKie2ufgojudmXO2oGKtfluDpgCa4c3B3Kdu0Mh0OtUcLz0T6b9BmFgju9gAww0mltH2vs RdmzIowugmSeJZm0+ujwbs9++yaycaRW/nIFGgOc5XZAHbcDDPVM5KKZG7ZXsXwBm3ha1Pn8PnzJ nbuhTzW5OZONhuZSuwI3B6+dm8rCiOgBYC1YJtCveAhxaEVaaIEWLkrI6PY0fGrZlYyonTtywymf c4nsjtFVPvnrLF1YcXLfle8kvBqDi8rDD37KjVQI9UyKPcXE8kUaCr7eLOI2y2Pb8K5kWBlyWzq7 09NEOqfbhq5Ki7DaneAuChF2MgRCRLAOqWck8g== ) ;; 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 h.root-servers.net for cz/DS
	Received 366 bytes from 198.97.190.53
	;; Response received from [198.97.190.53] 366 octets ;; HEADER SECTION ;; id = 38889 ;; 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 20260826050000 20260813040000 57780 . w3sauwPKie2ufgojudmXO2oGKtfluDpgCa4c3B3Kdu0Mh0OtUcLz0T6b9BmFgju9gAww0mltH2vs RdmzIowugmSeJZm0+ujwbs9++yaycaRW/nIFGgOc5XZAHbcDDPVM5KKZG7ZXsXwBm3ha1Pn8PnzJ nbuhTzW5OZONhuZSuwI3B6+dm8rCiOgBYC1YJtCveAhxaEVaaIEWLkrI6PY0fGrZlYyonTtywymf c4nsjtFVPvnrLF1YcXLfle8kvBqDi8rDD37KjVQI9UyKPcXE8kUaCr7eLOI2y2Pb8K5kWBlyWzq7 09NEOqfbhq5Ki7DaneAuChF2MgRCRLAOqWck8g== ) ;; 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 20260826050000 20260813040000 57780 . w3sauwPKie2ufgojudmXO2oGKtfluDpgCa4c3B3Kdu0Mh0OtUcLz0T6b9BmFgju9gAww0mltH2vs RdmzIowugmSeJZm0+ujwbs9++yaycaRW/nIFGgOc5XZAHbcDDPVM5KKZG7ZXsXwBm3ha1Pn8PnzJ nbuhTzW5OZONhuZSuwI3B6+dm8rCiOgBYC1YJtCveAhxaEVaaIEWLkrI6PY0fGrZlYyonTtywymf c4nsjtFVPvnrLF1YcXLfle8kvBqDi8rDD37KjVQI9UyKPcXE8kUaCr7eLOI2y2Pb8K5kWBlyWzq7 09NEOqfbhq5Ki7DaneAuChF2MgRCRLAOqWck8g== )`
	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 d.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 289 octets ;; HEADER SECTION ;; id = 39443 ;; 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 MkbE2np2qGxtJuvEY+Ea/nG97tDf6jcOjV79MzI3qAm+IfkphxoTICf1/A5qQ78+IzYdeSzgAou8 2x7IUvMEOQ== ) ; keytag 5166 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20260823102134 20260809085134 20237 cz. 1bYZntaYR4S+TdnHvnFYebgVTgs5GSp9SaIV7cE150HgFJpebh/Q7IfBy08cGnPOJ1UApedO/Rae 2IPH9qRntA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 MkbE2np2qGxtJuvEY+Ea/nG97tDf6jcOjV79MzI3qAm+IfkphxoTICf1/A5qQ78+IzYdeSzgAou8 2x7IUvMEOQ== ) ; keytag 5166`
	`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 20260823102134 20260809085134 20237 cz. 1bYZntaYR4S+TdnHvnFYebgVTgs5GSp9SaIV7cE150HgFJpebh/Q7IfBy08cGnPOJ1UApedO/Rae 2IPH9qRntA== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=5166 is now in the chain-of-trust
	Query to c.ns.nic.cz for nic.cz/A
	Received 1050 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 1050 octets ;; HEADER SECTION ;; id = 18493 ;; 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 20260821012554 20260806235554 37235 nic.cz. BLXlBSSHo1tzuYuZBPj7AsN/tcn8/NGNp5WEqMYcqjank2INnzoxiyJzWl7L8uVfaNWwRUF9E1L7 azFbSozFUw== ) ;; AUTHORITY SECTION (4 records) nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN NS b.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20260821012554 20260806235554 37235 nic.cz. ENYhgQraFtTjj/HvI4cN/sd6HRZCpBa5A8IHlzir6Jy+qEdrHNj5ecSOhAdnun5rKs+o4RR9ClO4 ZugCvR6wXQ== ) ;; 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 20260821012554 20260806235554 37235 nic.cz. 1wvmT6bUKXc+0woSaKysX0GYycCnqYQqxu4xjJChJF40fUMts6sIDx2bWQjBP5dEGhLiE/EHH8h6 1GYcL3k0Cw== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. 5rhWs3Kp4+NmtYX3ASVcRgXp/bw/yteemg13FYTwYnWyX0iAKaTooksfVP/QVogpRWJcENWaRR+o H/B2YbPjRg== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. brpxbQRC8XzP3DU1r+1dhqZWXfxb8fsD1z+AsPO2JvQKngCqpI+pSHSfJG8LubAxGAyqTNI/NnZu sL7v1Aojhg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. d137leSEIkmtedT2obybdb6i0YUGNxifRl1WbBC1ssE5H6oHOmrYOeO4VI0ED3xDA4whZVeU83KP 99TJtxc4Ig== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. NLZK3JPIgqnrYUyNT1da4HSViVmonPMU4tVbYn6PcevaF/PjcXr9quEc2NXjNd7FpThKTL1dgWLQ VrbmVe1kAw== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. h9V8L8vulXw0cxYKzlwjGW6DzhuEKvKAmCIYZ4+Oiu+u0IHq9B++eX9aTnhylSC8C1m4ruVDvYBo 8OeTetywEQ== ) ;; { "EDNS-VERSION": 0 }
	c.ns.nic.cz is authoritative for nic.cz
	Query to b.ns.nic.cz for nic.cz/DNSKEY
	Received 297 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 297 octets ;; HEADER SECTION ;; id = 46780 ;; 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 5KSTrgVdlXWmGa4uhr4qRPKl4kVWJCz2vtSnL3tF6mvteDOO1NHMevixrwdlYRuFo5nKloB9zepD fm3fFTrjFA== ) ; keytag 37235 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 20260821025554 20260807012554 54415 nic.cz. NrB6OFP8YZctXKb0BaQXJ3Qtko7pkKI/CiqOF3PbgJSYwBTbcets3JrWuxqYD9Am723/JUPwv2ty xWHiUbmiDQ== ) ;; 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 = 35301 ;; 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 b.ns.nic.cz. nic.cz. 1800 IN NS a.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20260821012554 20260806235554 37235 nic.cz. ENYhgQraFtTjj/HvI4cN/sd6HRZCpBa5A8IHlzir6Jy+qEdrHNj5ecSOhAdnun5rKs+o4RR9ClO4 ZugCvR6wXQ== ) ;; 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 20260821012554 20260806235554 37235 nic.cz. 1wvmT6bUKXc+0woSaKysX0GYycCnqYQqxu4xjJChJF40fUMts6sIDx2bWQjBP5dEGhLiE/EHH8h6 1GYcL3k0Cw== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. 5rhWs3Kp4+NmtYX3ASVcRgXp/bw/yteemg13FYTwYnWyX0iAKaTooksfVP/QVogpRWJcENWaRR+o H/B2YbPjRg== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. brpxbQRC8XzP3DU1r+1dhqZWXfxb8fsD1z+AsPO2JvQKngCqpI+pSHSfJG8LubAxGAyqTNI/NnZu sL7v1Aojhg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. d137leSEIkmtedT2obybdb6i0YUGNxifRl1WbBC1ssE5H6oHOmrYOeO4VI0ED3xDA4whZVeU83KP 99TJtxc4Ig== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. NLZK3JPIgqnrYUyNT1da4HSViVmonPMU4tVbYn6PcevaF/PjcXr9quEc2NXjNd7FpThKTL1dgWLQ VrbmVe1kAw== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. h9V8L8vulXw0cxYKzlwjGW6DzhuEKvKAmCIYZ4+Oiu+u0IHq9B++eX9aTnhylSC8C1m4ruVDvYBo 8OeTetywEQ== ) ;; { "EDNS-VERSION": 0 }
	Found nic.cz nameservers: d.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz

nic.cz

	Checking DS between cz and nic.cz
	Query to c.ns.nic.cz for nic.cz/DS
	Received 181 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 181 octets ;; HEADER SECTION ;; id = 29595 ;; 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 20260823054724 20260809041724 5166 cz. AfmAVcVtFlXzmgmHpVK9uXTW7cvRcSJt8ErMMyG0jeFzpc9jdZcj6XGzFa7G/30Gcj9R92Sd6eul S5vEj+gpnA== ) ;; 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 20260823054724 20260809041724 5166 cz. AfmAVcVtFlXzmgmHpVK9uXTW7cvRcSJt8ErMMyG0jeFzpc9jdZcj6XGzFa7G/30Gcj9R92Sd6eul S5vEj+gpnA== )`
	RRSIG=5166 and DNSKEY=5166 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 b.ns.nic.cz for nic.cz/DNSKEY
	Found 2 DNSKEY records for nic.cz
	`nic.cz. 1800 IN DNSKEY ( 256 3 13 5KSTrgVdlXWmGa4uhr4qRPKl4kVWJCz2vtSnL3tF6mvteDOO1NHMevixrwdlYRuFo5nKloB9zepD fm3fFTrjFA== ) ; keytag 37235`
	`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 20260821025554 20260807012554 54415 nic.cz. NrB6OFP8YZctXKb0BaQXJ3Qtko7pkKI/CiqOF3PbgJSYwBTbcets3JrWuxqYD9Am723/JUPwv2ty xWHiUbmiDQ== )`
	RRSIG=54415 and DNSKEY=54415/SEP verifies the DNSKEY RRset
	DNSKEY=37235 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 = 60239 ;; 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 20260821012554 20260806235554 37235 nic.cz. BLXlBSSHo1tzuYuZBPj7AsN/tcn8/NGNp5WEqMYcqjank2INnzoxiyJzWl7L8uVfaNWwRUF9E1L7 azFbSozFUw== ) ;; 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 d.ns.nic.cz for nic.cz/SOA
	Received 1081 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 1081 octets ;; HEADER SECTION ;; id = 20288 ;; 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. 1786608688 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20260827081128 20260813064128 37235 nic.cz. eRn3uZ8EqQnxy/ssPPagMP/fQVLmTaRzMED16xnnnNsEsnnnJRGrfeG6H5ZzwSbaurFSVGNg9/sR 37sIC16DPA== ) ;; 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 20260821012554 20260806235554 37235 nic.cz. ENYhgQraFtTjj/HvI4cN/sd6HRZCpBa5A8IHlzir6Jy+qEdrHNj5ecSOhAdnun5rKs+o4RR9ClO4 ZugCvR6wXQ== ) ;; 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 20260821012554 20260806235554 37235 nic.cz. 1wvmT6bUKXc+0woSaKysX0GYycCnqYQqxu4xjJChJF40fUMts6sIDx2bWQjBP5dEGhLiE/EHH8h6 1GYcL3k0Cw== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. 5rhWs3Kp4+NmtYX3ASVcRgXp/bw/yteemg13FYTwYnWyX0iAKaTooksfVP/QVogpRWJcENWaRR+o H/B2YbPjRg== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. brpxbQRC8XzP3DU1r+1dhqZWXfxb8fsD1z+AsPO2JvQKngCqpI+pSHSfJG8LubAxGAyqTNI/NnZu sL7v1Aojhg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. d137leSEIkmtedT2obybdb6i0YUGNxifRl1WbBC1ssE5H6oHOmrYOeO4VI0ED3xDA4whZVeU83KP 99TJtxc4Ig== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. NLZK3JPIgqnrYUyNT1da4HSViVmonPMU4tVbYn6PcevaF/PjcXr9quEc2NXjNd7FpThKTL1dgWLQ VrbmVe1kAw== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. h9V8L8vulXw0cxYKzlwjGW6DzhuEKvKAmCIYZ4+Oiu+u0IHq9B++eX9aTnhylSC8C1m4ruVDvYBo 8OeTetywEQ== ) ;; { "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 = 59718 ;; 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. 1786608688 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20260827081128 20260813064128 37235 nic.cz. eRn3uZ8EqQnxy/ssPPagMP/fQVLmTaRzMED16xnnnNsEsnnnJRGrfeG6H5ZzwSbaurFSVGNg9/sR 37sIC16DPA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	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 20260821012554 20260806235554 37235 nic.cz. BLXlBSSHo1tzuYuZBPj7AsN/tcn8/NGNp5WEqMYcqjank2INnzoxiyJzWl7L8uVfaNWwRUF9E1L7 azFbSozFUw== )`
	RRSIG=37235 and DNSKEY=37235 verifies the A RRset

nic.cz

	Query to a.ns.nic.cz for nic.cz/A
	Timeout querying a.ns.nic.cz/194.0.12.1 for nic.cz/A
	All Queries to a.ns.nic.cz for nic.cz/A timed out or failed
	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 = 43267 ;; 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 20260821012554 20260806235554 37235 nic.cz. BLXlBSSHo1tzuYuZBPj7AsN/tcn8/NGNp5WEqMYcqjank2INnzoxiyJzWl7L8uVfaNWwRUF9E1L7 azFbSozFUw== ) ;; AUTHORITY 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 20260821012554 20260806235554 37235 nic.cz. ENYhgQraFtTjj/HvI4cN/sd6HRZCpBa5A8IHlzir6Jy+qEdrHNj5ecSOhAdnun5rKs+o4RR9ClO4 ZugCvR6wXQ== ) ;; 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 20260821012554 20260806235554 37235 nic.cz. 1wvmT6bUKXc+0woSaKysX0GYycCnqYQqxu4xjJChJF40fUMts6sIDx2bWQjBP5dEGhLiE/EHH8h6 1GYcL3k0Cw== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. 5rhWs3Kp4+NmtYX3ASVcRgXp/bw/yteemg13FYTwYnWyX0iAKaTooksfVP/QVogpRWJcENWaRR+o H/B2YbPjRg== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. brpxbQRC8XzP3DU1r+1dhqZWXfxb8fsD1z+AsPO2JvQKngCqpI+pSHSfJG8LubAxGAyqTNI/NnZu sL7v1Aojhg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. d137leSEIkmtedT2obybdb6i0YUGNxifRl1WbBC1ssE5H6oHOmrYOeO4VI0ED3xDA4whZVeU83KP 99TJtxc4Ig== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20260821012554 20260806235554 37235 nic.cz. NLZK3JPIgqnrYUyNT1da4HSViVmonPMU4tVbYn6PcevaF/PjcXr9quEc2NXjNd7FpThKTL1dgWLQ VrbmVe1kAw== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20260821012554 20260806235554 37235 nic.cz. h9V8L8vulXw0cxYKzlwjGW6DzhuEKvKAmCIYZ4+Oiu+u0IHq9B++eX9aTnhylSC8C1m4ruVDvYBo 8OeTetywEQ== ) ;; { "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
	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 20260821012554 20260806235554 37235 nic.cz. BLXlBSSHo1tzuYuZBPj7AsN/tcn8/NGNp5WEqMYcqjank2INnzoxiyJzWl7L8uVfaNWwRUF9E1L7 azFbSozFUw== )`
	RRSIG=37235 and DNSKEY=37235 verifies the A RRset

nic.cz

No response from nic.cz nameservers

Move your mouse over any or symbols for remediation hints.

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