kalendar.nic.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:50:4c:a0:79:86:99:6a:1e:54:b8:72:b3:02:18:ff:57:08 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=kalendar.nic.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:50:4c:a0:79:86:99:6a:1e:54:b8:72:b3:02:18:ff:57:08
Serial Number (int): 288661301708968451510339820670046003222280
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 82:9a:5a:80:32:c8:09:1a:90:1a:88:ca:2c:b1:01:dd:1b:e6:12:3a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 94:97:b0:e6:a7:9e:6a:17:67:ec:0c:0a:a8:e8:e3:4f:50:f4:68:44
Fingerprint (sha256): 13:26:a6:e6:44:5b:f7:76:e2:7b:2d:ff:a4:30:08:c1:7c:f3:c7:ea:93:30:e4:89:77:66:4f:d6:8c:c6:f3:f5

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org/

Check the revocation status for certificate kalendar.nic.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for kalendar.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

calendar.nic.cz
kalendar.nic.cz

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Certificate

The complete raw certificate details for kalendar.nic.cz in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 288661301708968451510339820670046003222280
 . . . . . . . . [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 2017-02-02 09:01:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-05-03 09:01:00 +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 'kalendar.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 684681066029007155855257649335224692347459239925109023626796885774394579218124502500714853995595810113403603084016399936829389189650813686659295841774894752390853472392980520166101710899221404441978678369960562082640712302032017846730012100099111982086959220414589733813866441198779635895467576937326768492938523447526295363315570184904677924315794099083815595813471924630217071030209548081684004882164788585600246724218515037634050511637059577834684076532314337267529200834475795643514289535551786697499576009319448871362109395567125066893566395291543129236633803709687485323468157395081858649818210185571491465320508112068770543977150208056828564253969487882928707808344244235464085765529159485260879400010762793824940359219839390932768420298109118397571384419983709276214577786823104764871082802745345942620570739127993896738565883924564785894031254958393994627061195030464948234721122432784539058995262680493889185618053390583020384349892622089224356976574117609977338875608328996898386858582501153137357200154699565769953689868851674733499692259799149880569056860017005571376242494422424939136444446794364738140882750603613700880953006669877659172217322551944722324811990339509912010226325688875432919037098868247650780365686757
 . . . . . . . . . . . . . . . . . . . . [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)
							829a5a8032c8091a901a88ca2cb101dd1be6123a
 . . . . . . . . . . . . . . . . [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 (100 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 (36 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'calendar.nic.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kalendar.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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