rdap.nic.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:b4:52:58:16:33:d3:f4:96:72:55:b6:dc:be:b0:76:4b:b5 was issued on by Let's Encrypt.
This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.
We have idenified some issues with this certificate:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=rdap.nic.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:b4:52:58:16:33:d3:f4:96:72:55:b6:dc:be:b0:76:4b:b5Serial Number (int): 322697137909146822123689148652566269545397
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 36:5f:77:bd:de:5e:d8:9f:1a:12:33:cc:fc:82:92:7f:a3:b0:70:38
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 8e:8d:ac:39:45:f9:69:d7:26:20:11:4d:81:19:7e:ba:e3:9f:05:8d
Fingerprint (sha256): 02:00:35:5d:f7:0c:22:13:7b:b3:73:54:91:00:ab:24:01:4e:88:25:8c:3e:20:b6:a0:1e:69:21:74:5b:2f:37
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate rdap.nic.cz
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for rdap.nic.cz
Public Key Algorithm
RSA
Key Size
4096
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
8 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
rdap.nic.cz
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Certificate
The complete raw certificate details for rdap.nic.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIF+TCCBOGgAwIBAgISA7RSWBYz0/SWclW23L6wdku1MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xNzA4MjgwOTAyMDBaFw0x NzExMjYwOTAyMDBaMBYxFDASBgNVBAMTC3JkYXAubmljLmN6MIICIjANBgkqhkiG 9w0BAQEFAAOCAg8AMIICCgKCAgEAtkFJE3abK52qzczBwWpuSnjhV76wrBVikbAI cGFTBqoTNbVieM3OBlY7CYiUOxFWk0hBkMJ6MYCJQN4nYsGQ3qNjsO7g3PpH3M5H ZK753ttTY2za3bnH3VSIytofuvRvmiO/3sNkkKZ4v56qZJNLJvtX3CViYkdkCABu VbW0rOovRAunUAz5txIYSyfBNWfjG5/YwVL61IeuJSRZb9RKzkdXHfztKzg1Yjsj +b/bkpzpeqbottTLBQ0jUW5IpbfEMcVqFD1YPsv/gsrPG758DcgM6JY0otDyP6Lu ggBwNs+uD8ZSCqrqilQTZjRVF5nJnPd4BC9QlnLv9styj4ehcnho9cbutRQf90k5 RBR+mLdHR3vLSAF+UJCVuDmJnPDrBoCBLF7oVKZEFt+ss6+x0MiwQv6fDCaCxORd UNH0EJjzhc4d/w3TW4uGWV6B4mz6va1Eu3BD1ZBUvebsLh6XhOfcU12fVCsYHa4e rBhVn1kkN2eIx7qorRY9VIxk2+EPkp+4kPhlR0FJDXJuSRHLPRXXyhSui25ysjnD fjT48B68F/yrpvQHKAYeqF61FP15B12uU74mtK4wPMu14YADGJ+CPItVLljtEmSg 0l2WLu6UCgwpkoF7/vq2bX2nNFdtHO6phPvFfrcfDdcV3ed3A/GOxFEOfTTIl6ha IHhKSzsCAwEAAaOCAgswggIHMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggr BgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUNl93vd5e 2J8aEjPM/IKSf6OwcDgwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEw bwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMu bGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMu bGV0c2VuY3J5cHQub3JnLzAWBgNVHREEDzANggtyZGFwLm5pYy5jejCB/gYDVR0g BIH2MIHzMAgGBmeBDAECATCB5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYBBQUHAgEW Gmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIGrBggrBgEFBQcCAjCBngyBm1Ro aXMgQ2VydGlmaWNhdGUgbWF5IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkgUmVseWlu ZyBQYXJ0aWVzIGFuZCBvbmx5IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUgQ2VydGlm aWNhdGUgUG9saWN5IGZvdW5kIGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQub3JnL3Jl cG9zaXRvcnkvMA0GCSqGSIb3DQEBCwUAA4IBAQCBNdEZ5pdg9k54poFNCIWpN472 yee1bX/hmH53mjY+mfoX3GhkhU+NEeVt2K+CEiPEY/mGGFqox4S7NgpOUubEMv76 YY2/Ao3EsIQnRpyFHCQaD6w1rDkZx1i0xEJ9WtKe+91Mwj35QcrtYNzzukrMLO3U 1Km8SXAaDYPOfCIRSvDJJrlx6tvtKLFzYvLJSTw1gHvT0N4ihXn3h05U6OvDr7TK XM0Sb/DKhHz9pmTsT/AMhjGZzUdCjbDz34/Cj6PRvpNolAlBDV0SL/1zzJIRPUkf McCOhYmWxxoWcnUaU3E6m5ekzABGuPmKGA1nTILv9ktQqG0fqTKM96XvrD7g -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAtkFJE3abK52qzczBwWpu SnjhV76wrBVikbAIcGFTBqoTNbVieM3OBlY7CYiUOxFWk0hBkMJ6MYCJQN4nYsGQ 3qNjsO7g3PpH3M5HZK753ttTY2za3bnH3VSIytofuvRvmiO/3sNkkKZ4v56qZJNL JvtX3CViYkdkCABuVbW0rOovRAunUAz5txIYSyfBNWfjG5/YwVL61IeuJSRZb9RK zkdXHfztKzg1Yjsj+b/bkpzpeqbottTLBQ0jUW5IpbfEMcVqFD1YPsv/gsrPG758 DcgM6JY0otDyP6LuggBwNs+uD8ZSCqrqilQTZjRVF5nJnPd4BC9QlnLv9styj4eh cnho9cbutRQf90k5RBR+mLdHR3vLSAF+UJCVuDmJnPDrBoCBLF7oVKZEFt+ss6+x 0MiwQv6fDCaCxORdUNH0EJjzhc4d/w3TW4uGWV6B4mz6va1Eu3BD1ZBUvebsLh6X hOfcU12fVCsYHa4erBhVn1kkN2eIx7qorRY9VIxk2+EPkp+4kPhlR0FJDXJuSRHL PRXXyhSui25ysjnDfjT48B68F/yrpvQHKAYeqF61FP15B12uU74mtK4wPMu14YAD GJ+CPItVLljtEmSg0l2WLu6UCgwpkoF7/vq2bX2nNFdtHO6phPvFfrcfDdcV3ed3 A/GOxFEOfTTIl6haIHhKSzsCAwEAAQ== -----END PUBLIC KEY-----
ASN.1 decoded
[c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2 . . . . . . . . [c:0|t:2|false] INTEGER 322697137909146822123689148652566269545397 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt Authority X3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-08-28 09:02:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-11-26 09:02:00 +0000 UTC . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'rdap.nic.cz' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption) . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 743535616520382504320108455799797701838390775299503073138825303370743468176620014069005770188586707020334469216292840513838738672676530606712336071923741516898678918075739213167359414058652566439216459345684476233607487659952598601615010043862569193533390792813024567479343988787949379944774590596398401648665403758834007836579716304889501545001615349282996736670829271711648057038609052465544208325080940011516933406070811041617606634998489141978428056020418871157764565780179978484062951061374234353503551721107574424874755056618600922005376579888094476803218434969243591578377340384292802588571422298148055950243544138177490643736708402530736659129149516755720031138963354820453600842031389960549563878290448226308306482380407367730135888080012931574495008631277067286154535234134230703340517547750519569251263930183730457917189292259427826020189885453464460369623646003445757679668127726802202131303818090565901696531165222249045561044441156830547428606699251091109838379540376242773710233197030449151713850720993089616435933732468781521449432083271004200053272535506599068277329934425715532434882252699733949471605043294868317754852052029013417416465589727768034512017336171542368630418480998638047761323685962240144760719952699 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537 . . . . . . . . [c:2|t:3|true] ORAddress . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits) 05a0 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 365f77bdde5ed89f1a1233ccfc82927fa3b07038 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (99 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.int-x3.letsencrypt.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cert.int-x3.letsencrypt.org/' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (15 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'rdap.nic.cz' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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