public.nic.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:f6:6e:dc:a4:93:64:cd:d9:6d:62:ce:10:cc:31:75:3f:c2 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=public.nic.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:f6:6e:dc:a4:93:64:cd:d9:6d:62:ce:10:cc:31:75:3f:c2
Serial Number (int): 345193680780669732605976851614367158190018
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 43:c1:bb:7f:ff:b3:9f:02:eb:8a:a8:da:bc:e7:6a:4e:34:72:a0:a9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 47:2e:d2:df:6a:54:d9:e6:fa:44:14:51:a4:36:52:df:74:51:c1:2d
Fingerprint (sha256): 02:bb:47:00:c3:1c:68:5f:17:d4:48:3b:30:b2:15:de:fe:0d:c1:2b:2a:d2:d1:6e:9e:af:c3:a9:4b:90:50:2f

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 public.nic.cz

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for public.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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

public.nic.cz

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Certificate

The complete raw certificate details for public.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 345193680780669732605976851614367158190018
 . . . . . . . . [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 2019-04-29 07:00:18 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-28 07:00:18 +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 'public.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 932486309228917876888894513941593535066382376792144800465004556810533807655341141867710932273592924636280945276506852762375776186039610485003393230573406293632537249061162324244901984712418197141983341068835733248087452347268811261667366895176384813445646965608083715100449378011876048561750305164458076576368274320458035823933966719583520257636410230188924047008079430587533626649230555014402554532330073851306943081036596299443060192026459633106420995410696483000516410530107674994885330984496111379007880234290696288449801197763649565411349282663228746727537184833148892795909062122173487853438943323191108006322193407275736603748740956519467989817755855421123850552283191126572621210773429312457950338920919244467083575050236174917222269105614754583542724822004110499776962328140204832216744624390703787136065230227937035261403573611518656012279125792075328145966457302913217282209610776080860029959353275953815505503443085137619630911848308120691136668565612713413572356656000388220483079125618038373394677602246750689943378528128627943127999119702789669826002886748826108671991106747320976119291469591376440025158871948644080550514626315307788117434055649180108482772816023805529774656098453624299085533523547196008289775140029
 . . . . . . . . . . . . . . . . . . . . [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)
							43c1bb7fffb39f02eb8aa8dabce76a4e3472a0a9
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'public.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 (69 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016a681bdff600000403004730450221009c787a4e53500a9e57d0bbdeb14d06f968045b2c1f0b97964d7c5c2262596687022032581892915651fa93fc8b6d1c62272ba00ec10a2ed4f1b2e4c62df787b18e6400770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016a681bdfbf0000040300483046022100c926414f6455275d9db22561a4286f618aa1e3f7fa0b39e02d77791ec8c769e0022100b514935b1bc578681e56a1c91abaf57a218dd88f0fa1f5e4776ab5e8125b6908
 . . . . [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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