DNSSEC Debugger

Domain Name:

Time: 2025-12-21 13:16:16 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 h.root-servers.net for ./DNSKEY
	Received 1414 bytes from 198.97.190.53
	;; Response received from [198.97.190.53] 1414 octets ;; HEADER SECTION ;; id = 11097 ;; 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": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (5 records) . 172800 IN DNSKEY ( 256 3 8 AwEAAeuS7hMRZ7muj1c/ew2DoavxkBw3jUG5R79pKVDI39fxvlD1HfJYGJERnXuV4SrQfUPzWw/l t5Axb0EqXL/sQ2ZyntVmwQwoSXi2l9smlIKh2UrkTmmozRCPe7GS4fZTE4Ew7AV4YprTLgVmxiGP 4unRuXkYOgQJXCIBpVCmEdUli6X2sm0i5ZilU/Q+rX3RDw+eYPP7K0cJnJ+ZnvQDy14+BFtreWl9 enNQljgGpBp26lEp1z7AbvUfzkQNVCVGaM8jEaCSALXiROlwCQMOdj+tpLXFf99kdJnTQw2cpEr1 uGs/yENAJpoGhbjZAoIkXzDUBSlfFeYz7FWzH6gIe7M= ) ; keytag 61809 . 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 DNSKEY ( 256 3 8 AwEAAbNTVC2+pry4pc37pZI9Oj6b8FHxT3VGrvSPKLE1Tjyfe2kUZUtVX5xrv6AV4BVO+ygrYjGZ MNgEnbLU4zknnlnhI2e0g6iTza1aZh0dRZXGH16C1NUNq1CxBkUhIYQhQDeIOtLacx+RmFTc+hSH JJ2MJ79IS00kA7eKi6mofQ7SPJmdJVjI+JAx791y0f5QaB+iHGANU53FwiYXNUQjfAzCrtOaSevG sx8SO8BTaXLAjFq5eewOtwScVwfVDhEXlvpE6e+mIncwhNKaMRD9IPuHENqCNPI5MjxfAMVS6cEY 8eEozIkv/vHc+0Auu3n+Fcx6F2Js4KPXaHEShAXugfU= ) ; keytag 21831 . 172800 IN RRSIG ( DNSKEY 8 0 172800 20260110000000 20251220000000 20326 . RZO5FQjtg6Yk0Dara521nCUfYnQxCLAVdbC+buKQVAKlHsZ6srxXHNAL8DMoHohT+PyIlPFAQMb5 fBZatrDaqxpZZ/YbC0A2zxGxOwuOPb1xRbqi6E3zSKfilTRuAux5jN0KYbZZhFxda62e9Hv+2GJs MLixTpiV3RVXtxENI2GPRA8mRRJPBDR7XVQF/2Pz+vjcAW07dp27CrNmQPyZtVjSgw49Jz1rSsAm +EEKO6C7KLG5hmENQr165D3YjMWCs93YhTY8bhWYVqeDtsB1BwoEWkMqSFs4I4+uMd14BHvO6mlq zOZyWC+3kXYTpoAlE0kFhKNv1i54wgHRB+paqw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 4 DNSKEY records for .
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAeuS7hMRZ7muj1c/ew2DoavxkBw3jUG5R79pKVDI39fxvlD1HfJYGJERnXuV4SrQfUPzWw/l t5Axb0EqXL/sQ2ZyntVmwQwoSXi2l9smlIKh2UrkTmmozRCPe7GS4fZTE4Ew7AV4YprTLgVmxiGP 4unRuXkYOgQJXCIBpVCmEdUli6X2sm0i5ZilU/Q+rX3RDw+eYPP7K0cJnJ+ZnvQDy14+BFtreWl9 enNQljgGpBp26lEp1z7AbvUfzkQNVCVGaM8jEaCSALXiROlwCQMOdj+tpLXFf99kdJnTQw2cpEr1 uGs/yENAJpoGhbjZAoIkXzDUBSlfFeYz7FWzH6gIe7M= ) ; keytag 61809`
	`. 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 DNSKEY ( 256 3 8 AwEAAbNTVC2+pry4pc37pZI9Oj6b8FHxT3VGrvSPKLE1Tjyfe2kUZUtVX5xrv6AV4BVO+ygrYjGZ MNgEnbLU4zknnlnhI2e0g6iTza1aZh0dRZXGH16C1NUNq1CxBkUhIYQhQDeIOtLacx+RmFTc+hSH JJ2MJ79IS00kA7eKi6mofQ7SPJmdJVjI+JAx791y0f5QaB+iHGANU53FwiYXNUQjfAzCrtOaSevG sx8SO8BTaXLAjFq5eewOtwScVwfVDhEXlvpE6e+mIncwhNKaMRD9IPuHENqCNPI5MjxfAMVS6cEY 8eEozIkv/vHc+0Auu3n+Fcx6F2Js4KPXaHEShAXugfU= ) ; keytag 21831`
	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 20260110000000 20251220000000 20326 . RZO5FQjtg6Yk0Dara521nCUfYnQxCLAVdbC+buKQVAKlHsZ6srxXHNAL8DMoHohT+PyIlPFAQMb5 fBZatrDaqxpZZ/YbC0A2zxGxOwuOPb1xRbqi6E3zSKfilTRuAux5jN0KYbZZhFxda62e9Hv+2GJs MLixTpiV3RVXtxENI2GPRA8mRRJPBDR7XVQF/2Pz+vjcAW07dp27CrNmQPyZtVjSgw49Jz1rSsAm +EEKO6C7KLG5hmENQr165D3YjMWCs93YhTY8bhWYVqeDtsB1BwoEWkMqSFs4I4+uMd14BHvO6mlq zOZyWC+3kXYTpoAlE0kFhKNv1i54wgHRB+paqw== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=61809 is now in the chain-of-trust
	DNSKEY=38696/SEP is now in the chain-of-trust
	DNSKEY=21831 is now in the chain-of-trust
	Query to d.root-servers.net for nic.cz/A
	Received 613 bytes from 199.7.91.13
	;; Response received from [199.7.91.13] 613 octets ;; HEADER SECTION ;; id = 63553 ;; 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": 1450, ;; "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 20260103050000 20251221040000 61809 . i2jgZFuHzkZiTItBdWvaWMS6BAE+19AQ0QGSMM4AamSR8YZ4NPHwikzhRCDq+fr5ourZH8bWpskw AwHCZGpqJNAxx2QQUsgLXOeIHky5QYDns6g28renOY+vdvDxjW0acI8/6QU/toO8lgEn45D9ENCD sBOwpq4yW0QfWJS76Rlr0KCTaMX1imw06f8Zt3XT5mhtYqG20TSI26oIxSnDnB3NqVLmTr1F5ckT lS8YyHljbE8IRvgx2Soy2H3wW0KZMVL9QzqFX+st5nFVLetpiS2bc/VD2O+6C2cPZKfMDRdSVZJ/ E+orUwvayjk8giWteIh5jTvmktWw/FqTB5HZcA== ) ;; 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 g.root-servers.net for cz/DNSKEY
	Received 615 bytes from 192.112.36.4
	;; Response received from [192.112.36.4] 615 octets ;; HEADER SECTION ;; id = 60766 ;; 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 b.ns.nic.cz. cz. 172800 IN NS d.ns.nic.cz. cz. 172800 IN NS a.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 20260103050000 20251221040000 61809 . i2jgZFuHzkZiTItBdWvaWMS6BAE+19AQ0QGSMM4AamSR8YZ4NPHwikzhRCDq+fr5ourZH8bWpskw AwHCZGpqJNAxx2QQUsgLXOeIHky5QYDns6g28renOY+vdvDxjW0acI8/6QU/toO8lgEn45D9ENCD sBOwpq4yW0QfWJS76Rlr0KCTaMX1imw06f8Zt3XT5mhtYqG20TSI26oIxSnDnB3NqVLmTr1F5ckT lS8YyHljbE8IRvgx2Soy2H3wW0KZMVL9QzqFX+st5nFVLetpiS2bc/VD2O+6C2cPZKfMDRdSVZJ/ E+orUwvayjk8giWteIh5jTvmktWw/FqTB5HZcA== ) ;; 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 }
	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 = 63990 ;; 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 20260103050000 20251221040000 61809 . i2jgZFuHzkZiTItBdWvaWMS6BAE+19AQ0QGSMM4AamSR8YZ4NPHwikzhRCDq+fr5ourZH8bWpskw AwHCZGpqJNAxx2QQUsgLXOeIHky5QYDns6g28renOY+vdvDxjW0acI8/6QU/toO8lgEn45D9ENCD sBOwpq4yW0QfWJS76Rlr0KCTaMX1imw06f8Zt3XT5mhtYqG20TSI26oIxSnDnB3NqVLmTr1F5ckT lS8YyHljbE8IRvgx2Soy2H3wW0KZMVL9QzqFX+st5nFVLetpiS2bc/VD2O+6C2cPZKfMDRdSVZJ/ E+orUwvayjk8giWteIh5jTvmktWw/FqTB5HZcA== ) ;; 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 20260103050000 20251221040000 61809 . i2jgZFuHzkZiTItBdWvaWMS6BAE+19AQ0QGSMM4AamSR8YZ4NPHwikzhRCDq+fr5ourZH8bWpskw AwHCZGpqJNAxx2QQUsgLXOeIHky5QYDns6g28renOY+vdvDxjW0acI8/6QU/toO8lgEn45D9ENCD sBOwpq4yW0QfWJS76Rlr0KCTaMX1imw06f8Zt3XT5mhtYqG20TSI26oIxSnDnB3NqVLmTr1F5ckT lS8YyHljbE8IRvgx2Soy2H3wW0KZMVL9QzqFX+st5nFVLetpiS2bc/VD2O+6C2cPZKfMDRdSVZJ/ E+orUwvayjk8giWteIh5jTvmktWw/FqTB5HZcA== )`
	RRSIG=61809 and DNSKEY=61809 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 c.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 289 octets ;; HEADER SECTION ;; id = 64641 ;; 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 mmnyoOam73cTqq5GFR0WXqnTEbXzCKtdo5m24QAQRUpPwjuIrrwtGV0LR/b/A+7uVDRE4yEpyv3T 1gGyxGGi0Q== ) ; keytag 2679 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20260101182134 20251218165134 20237 cz. CcLjDZLv7seBH7i0DZJEd+eN34fxVII5QF6nFvFxWbdNsFJq72J1avnyIznWFOWo6eHGeN+LosdE 59Seo7OdLQ== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 mmnyoOam73cTqq5GFR0WXqnTEbXzCKtdo5m24QAQRUpPwjuIrrwtGV0LR/b/A+7uVDRE4yEpyv3T 1gGyxGGi0Q== ) ; keytag 2679`
	`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 20260101182134 20251218165134 20237 cz. CcLjDZLv7seBH7i0DZJEd+eN34fxVII5QF6nFvFxWbdNsFJq72J1avnyIznWFOWo6eHGeN+LosdE 59Seo7OdLQ== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=2679 is now in the chain-of-trust
	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 = 63524 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. pREPuq3FVfSObOYiI/xSLE/6ji/InP6nMfO9lpJMtogLy+sYADAJ22f8CnFb+DnBjmLEnIlpe37c pV7UF9rrSA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. triT+KDmvyPu1jQlhWAi6nzm+eDCKHKlVyYPlcGmRP2waNZRDNpSOTPZ9NdkPutq4LXHUYPH6OCE wMuHwLpF8w== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TZQYGfqjbgXeDz6kBqKU6rFgttQyLePtbokcN0eImjdCyC5bps2Dp8lMZN3L4srF2NIwcOVNqBK+ Aj4zMLRWSA== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TJVz9tHo1fjIOuI9y/c289niOzJ9crLhxAjLcfbFSi3PesqxeZlP1PIcsS8nhtEyBpQpH7E0sO7W IcoNqTvojg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. IS9vmgP91eOcGhRzlT2xfnQdxuPV3Q02HZVLy4sowrb1kUkwCVvzENU3NYkO0VsCFTN7OO08EXVq 3nrJEkl2rA== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. X2pzkmXFPMwxaJset2j8/7vNVveIGkD+63yM8Pa9We4S0pNl0PAaRe9mbuIGLfQq3IyhdvX4Jhby A2PIGUIkbQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. vIj2MOVG3mT5ddYWq2/ToPxffWfReF9od23uShC6q960M0IDzlEs//5SJCe+8+uTrUyPCLi4WbRu J10jiK28oQ== ) ;; { "EDNS-VERSION": 0 }
	d.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 = 52652 ;; 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 f2hk4mhAPz0mPCOAuX7PxC0et4JVPhthlO7jiRXF8qkRMksnilBYb6k5wEYZMLfOw8+GKP1BfitE oTD04ijZfQ== ) ; keytag 43320 nic.cz. 1800 IN DNSKEY ( 256 3 13 JhK6CTHB/qoH7pXUNcjU2bJiPwnxY7la3mceTzXGLE4p0g0qi0U6yNRaTGZ42VkuOYLtoSGkLzOm hLnnBSjq8g== ) ; keytag 28741 nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20251230145554 20251216132554 43320 nic.cz. lmoNzCPVXUhN+V1borEHo21WbFZtr5h1p/+eqLARKsfs8zwObjUMvXjBq3lXkinue0zRtQZ7AX0/ tFZIVjfU6g== ) ;; 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 = 40573 ;; 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 a.ns.nic.cz. nic.cz. 1800 IN NS d.ns.nic.cz. nic.cz. 1800 IN RRSIG ( NS 13 2 1800 20251230132554 20251216115554 28741 nic.cz. pREPuq3FVfSObOYiI/xSLE/6ji/InP6nMfO9lpJMtogLy+sYADAJ22f8CnFb+DnBjmLEnIlpe37c pV7UF9rrSA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. triT+KDmvyPu1jQlhWAi6nzm+eDCKHKlVyYPlcGmRP2waNZRDNpSOTPZ9NdkPutq4LXHUYPH6OCE wMuHwLpF8w== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TZQYGfqjbgXeDz6kBqKU6rFgttQyLePtbokcN0eImjdCyC5bps2Dp8lMZN3L4srF2NIwcOVNqBK+ Aj4zMLRWSA== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TJVz9tHo1fjIOuI9y/c289niOzJ9crLhxAjLcfbFSi3PesqxeZlP1PIcsS8nhtEyBpQpH7E0sO7W IcoNqTvojg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. IS9vmgP91eOcGhRzlT2xfnQdxuPV3Q02HZVLy4sowrb1kUkwCVvzENU3NYkO0VsCFTN7OO08EXVq 3nrJEkl2rA== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. X2pzkmXFPMwxaJset2j8/7vNVveIGkD+63yM8Pa9We4S0pNl0PAaRe9mbuIGLfQq3IyhdvX4Jhby A2PIGUIkbQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. vIj2MOVG3mT5ddYWq2/ToPxffWfReF9od23uShC6q960M0IDzlEs//5SJCe+8+uTrUyPCLi4WbRu J10jiK28oQ== ) ;; { "EDNS-VERSION": 0 }
	Found nic.cz nameservers: b.ns.nic.cz, a.ns.nic.cz, d.ns.nic.cz

nic.cz

	Checking DS between cz and nic.cz
	Query to d.ns.nic.cz for nic.cz/DS
	Received 181 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 181 octets ;; HEADER SECTION ;; id = 55980 ;; 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 ( 43320 13 2 5cdbae76651fd9a04194aeb1bbb205d5a947c8674eb198a32a3ba5a612b5d099 ) nic.cz. 3600 IN RRSIG ( DS 13 2 3600 20251225134715 20251211121715 2679 cz. vcBdiBKTql9IAuLCZOkmccsoLTUNRLxs5JGVEZIfIg/sgGkLuy+6m05WugTrXo1MwsEwcwGpnIYs AKWGsWiOpA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for nic.cz in the cz zone
	DS=43320/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`nic.cz. 3600 IN RRSIG ( DS 13 2 3600 20251225134715 20251211121715 2679 cz. vcBdiBKTql9IAuLCZOkmccsoLTUNRLxs5JGVEZIfIg/sgGkLuy+6m05WugTrXo1MwsEwcwGpnIYs AKWGsWiOpA== )`
	RRSIG=2679 and DNSKEY=2679 verifies the DS RRset
	DS=43320/SHA-256 is now in the chain-of-trust
	`nic.cz. 3600 IN DS ( 43320 13 2 5cdbae76651fd9a04194aeb1bbb205d5a947c8674eb198a32a3ba5a612b5d099 )`
	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 = 9822 ;; 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 JhK6CTHB/qoH7pXUNcjU2bJiPwnxY7la3mceTzXGLE4p0g0qi0U6yNRaTGZ42VkuOYLtoSGkLzOm hLnnBSjq8g== ) ; keytag 28741 nic.cz. 1800 IN DNSKEY ( 257 3 13 f2hk4mhAPz0mPCOAuX7PxC0et4JVPhthlO7jiRXF8qkRMksnilBYb6k5wEYZMLfOw8+GKP1BfitE oTD04ijZfQ== ) ; keytag 43320 nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20251230145554 20251216132554 43320 nic.cz. lmoNzCPVXUhN+V1borEHo21WbFZtr5h1p/+eqLARKsfs8zwObjUMvXjBq3lXkinue0zRtQZ7AX0/ tFZIVjfU6g== ) ;; 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 JhK6CTHB/qoH7pXUNcjU2bJiPwnxY7la3mceTzXGLE4p0g0qi0U6yNRaTGZ42VkuOYLtoSGkLzOm hLnnBSjq8g== ) ; keytag 28741`
	`nic.cz. 1800 IN DNSKEY ( 257 3 13 f2hk4mhAPz0mPCOAuX7PxC0et4JVPhthlO7jiRXF8qkRMksnilBYb6k5wEYZMLfOw8+GKP1BfitE oTD04ijZfQ== ) ; keytag 43320`
	DNSKEY=43320/SEP is now in the chain-of-trust
	DS=43320/SHA-256 verifies DNSKEY=43320/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`nic.cz. 1800 IN RRSIG ( DNSKEY 13 2 1800 20251230145554 20251216132554 43320 nic.cz. lmoNzCPVXUhN+V1borEHo21WbFZtr5h1p/+eqLARKsfs8zwObjUMvXjBq3lXkinue0zRtQZ7AX0/ tFZIVjfU6g== )`
	RRSIG=43320 and DNSKEY=43320/SEP verifies the DNSKEY RRset
	DNSKEY=28741 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 = 34333 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; 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 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 = 43487 ;; 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. 1766307779 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20260104090259 20251221073259 28741 nic.cz. 5oDsr6cM+7IzANsvSOp0aenpWUYOTzzsc0v71Qmojyi6n95l5eSU4t4E10V9hXA9+oQwh23kq9iM jMmEvbVtDw== ) ;; 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 = 8650 ;; 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. 1766307779 ;serial 14400 ;refresh 3600 ;retry 1209600 ;expire 7200 ;minimum ) nic.cz. 1800 IN RRSIG ( SOA 13 2 1800 20260104090259 20251221073259 28741 nic.cz. 5oDsr6cM+7IzANsvSOp0aenpWUYOTzzsc0v71Qmojyi6n95l5eSU4t4E10V9hXA9+oQwh23kq9iM jMmEvbVtDw== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. pREPuq3FVfSObOYiI/xSLE/6ji/InP6nMfO9lpJMtogLy+sYADAJ22f8CnFb+DnBjmLEnIlpe37c pV7UF9rrSA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. triT+KDmvyPu1jQlhWAi6nzm+eDCKHKlVyYPlcGmRP2waNZRDNpSOTPZ9NdkPutq4LXHUYPH6OCE wMuHwLpF8w== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TZQYGfqjbgXeDz6kBqKU6rFgttQyLePtbokcN0eImjdCyC5bps2Dp8lMZN3L4srF2NIwcOVNqBK+ Aj4zMLRWSA== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TJVz9tHo1fjIOuI9y/c289niOzJ9crLhxAjLcfbFSi3PesqxeZlP1PIcsS8nhtEyBpQpH7E0sO7W IcoNqTvojg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. IS9vmgP91eOcGhRzlT2xfnQdxuPV3Q02HZVLy4sowrb1kUkwCVvzENU3NYkO0VsCFTN7OO08EXVq 3nrJEkl2rA== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. X2pzkmXFPMwxaJset2j8/7vNVveIGkD+63yM8Pa9We4S0pNl0PAaRe9mbuIGLfQq3IyhdvX4Jhby A2PIGUIkbQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. vIj2MOVG3mT5ddYWq2/ToPxffWfReF9od23uShC6q960M0IDzlEs//5SJCe+8+uTrUyPCLi4WbRu J10jiK28oQ== ) ;; { "EDNS-VERSION": 0 }
	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 = 3628 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== )`
	RRSIG=28741 and DNSKEY=28741 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 = 23269 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; AUTHORITY 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 20251230132554 20251216115554 28741 nic.cz. pREPuq3FVfSObOYiI/xSLE/6ji/InP6nMfO9lpJMtogLy+sYADAJ22f8CnFb+DnBjmLEnIlpe37c pV7UF9rrSA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. triT+KDmvyPu1jQlhWAi6nzm+eDCKHKlVyYPlcGmRP2waNZRDNpSOTPZ9NdkPutq4LXHUYPH6OCE wMuHwLpF8w== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TZQYGfqjbgXeDz6kBqKU6rFgttQyLePtbokcN0eImjdCyC5bps2Dp8lMZN3L4srF2NIwcOVNqBK+ Aj4zMLRWSA== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TJVz9tHo1fjIOuI9y/c289niOzJ9crLhxAjLcfbFSi3PesqxeZlP1PIcsS8nhtEyBpQpH7E0sO7W IcoNqTvojg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. IS9vmgP91eOcGhRzlT2xfnQdxuPV3Q02HZVLy4sowrb1kUkwCVvzENU3NYkO0VsCFTN7OO08EXVq 3nrJEkl2rA== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. X2pzkmXFPMwxaJset2j8/7vNVveIGkD+63yM8Pa9We4S0pNl0PAaRe9mbuIGLfQq3IyhdvX4Jhby A2PIGUIkbQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. vIj2MOVG3mT5ddYWq2/ToPxffWfReF9od23uShC6q960M0IDzlEs//5SJCe+8+uTrUyPCLi4WbRu J10jiK28oQ== ) ;; { "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 = 5064 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. pREPuq3FVfSObOYiI/xSLE/6ji/InP6nMfO9lpJMtogLy+sYADAJ22f8CnFb+DnBjmLEnIlpe37c pV7UF9rrSA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. triT+KDmvyPu1jQlhWAi6nzm+eDCKHKlVyYPlcGmRP2waNZRDNpSOTPZ9NdkPutq4LXHUYPH6OCE wMuHwLpF8w== ) a.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TZQYGfqjbgXeDz6kBqKU6rFgttQyLePtbokcN0eImjdCyC5bps2Dp8lMZN3L4srF2NIwcOVNqBK+ Aj4zMLRWSA== ) b.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. TJVz9tHo1fjIOuI9y/c289niOzJ9crLhxAjLcfbFSi3PesqxeZlP1PIcsS8nhtEyBpQpH7E0sO7W IcoNqTvojg== ) b.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. IS9vmgP91eOcGhRzlT2xfnQdxuPV3Q02HZVLy4sowrb1kUkwCVvzENU3NYkO0VsCFTN7OO08EXVq 3nrJEkl2rA== ) d.ns.nic.cz. 1800 IN RRSIG ( A 13 4 1800 20251230132554 20251216115554 28741 nic.cz. X2pzkmXFPMwxaJset2j8/7vNVveIGkD+63yM8Pa9We4S0pNl0PAaRe9mbuIGLfQq3IyhdvX4Jhby A2PIGUIkbQ== ) d.ns.nic.cz. 1800 IN RRSIG ( AAAA 13 4 1800 20251230132554 20251216115554 28741 nic.cz. vIj2MOVG3mT5ddYWq2/ToPxffWfReF9od23uShC6q960M0IDzlEs//5SJCe+8+uTrUyPCLi4WbRu J10jiK28oQ== ) ;; { "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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== )`
	RRSIG=28741 and DNSKEY=28741 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 = 48188 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; 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
	Received 153 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 153 octets ;; HEADER SECTION ;; id = 35492 ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== ) ;; 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 20251230132554 20251216115554 28741 nic.cz. leJBGSoVZjAKPyaGHZngX64+427D+XPuOfY/sFcJU5JtZOuwTabo9y8RhKavpVzdYNBh2rFVpplL oNCVJ03yKA== )`
	RRSIG=28741 and DNSKEY=28741 verifies the A RRset

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