www.deltazero.cz

Issued by R3

About this certificate

This digital certificate with serial number 04:80:2d:98:5d:c9:98:02:0a:3d:ac:40:4d:d5:f5:76:61:22 was issued on by Let's Encrypt.

With 8 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=www.deltazero.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:80:2d:98:5d:c9:98:02:0a:3d:ac:40:4d:d5:f5:76:61:22
Serial Number (int): 392065893084089926410566048900999965729058
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 9a:b8:3c:e2:d0:c0:8e:19:dd:b9:ab:cb:11:fd:c3:5c:e2:37:ab:5b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 2d:b9:58:8e:23:51:7b:a1:a5:cc:13:a3:76:11:c9:90:1c:a1:7e:6e
Fingerprint (sha256): 2a:49:0e:8e:19:67:46:14:88:d7:b5:c4:5e:fe:11:34:9d:9a:3e:e2:52:d7:64:b5:80:e2:26:5d:d9:5e:11:46

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate www.deltazero.cz

8

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.deltazero.cz

Public Key Algorithm

RSA

Key Size

2048

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

deltazero.cz
itos.carpenoctem.cz
itos.deltazero.cz
node.deltazero.cz
node.itos.carpenoctem.cz
node.itos.deltazero.cz
tools.deltazero.cz
www.deltazero.cz

Other certificates including the domain name deltazero.cz

(limited to 100 certificates)
www.isipos.cz
athena.dayvee.cz
www.deltazero.cz
www.deltazero.cz
www.deltazero.cz
www.deltazero.cz
www.isipos.cz
www.deltazero.cz
www.deltazero.cz
www.deltazero.cz
www.isipos.cz
www.deltazero.cz
www.deltazero.cz
www.isipos.cz
www.isipos.cz
www.deltazero.cz
www.isipos.cz

Certificate

The complete raw certificate details for www.deltazero.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4natT4MQUUxQLpsf485o
Sb1rxPcPka01p1zXuA4xt+Bs3uMoR88DqC6i43WX86hEBJvcylsHCpEjBE8J0rAB
yms5qjsdMiWHCCVp9E807stFlyHhDiYcb2J6687W64jNdiKKAh2bx6NuEuu6SB15
siOBKVa7SSJb0KiuObflWQNWv5/7dtlMGqKuavbU5/F6d6lCViVyu3u3rNcFL0V0
eDRPVMzQgl94WRh21obJOW6AjugoVmYpJ0onKbbRmD4/B3D9Pnliu2PljlNODd1g
XWIbrNIyo3rP6tLycfEkU3mreHYUb1XtvKY1d2BLGXL2T6EK1q2tYfR8yk2goL+u
YQIDAQAB
-----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 392065893084089926410566048900999965729058
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-19 19:25:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-17 19:25:01 +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 'www.deltazero.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 28588378729457948130123799772589650305665436888754202388051594209385539009601178587965784129583402989107122389817401487717483191745543788442999309077585707853967004680093596761791426339169981592639698829349019855911880391724559011987760122410691491200828823621213918341033545878287463047104472416428126039548641006122166181062662588775925331910611779180444541165445358797705054549295021108898351308056877632606164954621547227701490990798405644047893638205473949386126206878678525633065226188415135672310331665331608179932791327716677053080736230218298129502092538481117986881119440034601342165552326888735688854842977
 . . . . . . . . . . . . . . . . . . . . [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)
							9ab83ce2d0c08e19ddb9abcb11fdc35ce237ab5b
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (164 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'deltazero.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'itos.carpenoctem.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'itos.deltazero.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'node.deltazero.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'node.itos.carpenoctem.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'node.itos.deltazero.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tools.deltazero.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.deltazero.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b499cea9900000403004730450220697982db677410117a8a1dda493051a52ce0f718125832117be7f6753baaaa57022100c65b873710857b3a61ae079e16de923c4b18e0ac3993af6044452e1d9b0c2a7500770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b499ceac400000403004830460221009878f6086ee3b43c85b1ef2ed77f149cfe96199b09742637d475db58ccb0c675022100fc6618bb12dffb00d592426edf6ff56e79fb9fbc48dc0ff49568d02b3d201a2d
 . . . . [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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