DV SSL/TLS Certificate for *.koulia.fi

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the *.koulia.fi DV SSL/TLS Certificate

This certificate with serial number 05:d9:10:c3:07:1a:aa:02:04:f1:d2:9a:92:22:db:ae:1b:be for *.koulia.fi was issued on by Let's Encrypt.

With 7 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for *.koulia.fi provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:d9:10:c3:07:1a:aa:02:04:f1:d2:9a:92:22:db:ae:1b:be
Serial Number (int): 509424983570554267093829952176925533150142
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 01:e8:94:6b:1b:0e:2a:fb:b7:c3:b7:a7:33:bc:07:a9:54:e4:fc:93
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): d3:81:20:91:ff:76:34:cb:26:36:67:6b:54:5d:aa:34:ea:44:58:38
Fingerprint (SHA-256): ff:43:ca:54:94:4d:00:03:d8:44:98:8e:9c:0a:f3:e3:83:27:a5:81:90:b3:3f:0c:6e:02:78:f3:41:14:ed:d8

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/63.crl

Check the revocation status for certificate *.koulia.fi
7
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for *.koulia.fi

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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

*.koulia.fi
gedu.demo.koulia.fi
koulia.fi
www.gedu.demo.koulia.fi
www.gse.koulia.fi
www.gtrainerdemo.koulia.fi
www.koulutus.koulia.fi

X.509 Certificate

The complete raw X.509 certificate details for *.koulia.fi in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxifyGrqsHZhKZpSt29MU
8ga3qWdIGV9jb5oTBLCnJe1Q4eGMAKtt2IVjeTfpM8toTdul/5f3valr7+tRyBUj
M9MTvF53k0LXIuBqvuBy++AthR79EOy0Az3I9MDUrWz+9NJwC4vkfPb1U1Y01OmR
Z/XI24fUIRBJb0lR2f3bVYD8uNyypondMLe0KwJ8m8dpC9jkR0qvN3D6kln7Dbme
qKecG0UsrLdUxvnDZZUFl2fsxW/HRpdq/yEvEeopzkNW2/rJ9UWX53tG5pCw+dZe
gmQe1eOLa7/9JnkmO52di0xP3uQQy00V+9QerODzPG+vnzS/OSOE7BWcpt2h9NbJ
VwIDAQAB
-----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 509424983570554267093829952176925533150142
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-05-23 11:34:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-08-21 11:34:35 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String '*.koulia.fi'
 . . . . . . . . [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
 . . . . . . . . . . . . . . . . [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 25014882352140037361816840915287486261279765647694490113083458236053012195445286550562929001231252713846604662028933700761827268326858809804031585694695517244200752946933061437648219406453479955708050376579587083160913550436487166670161625019003580531949850608578745853126076416012565350654107509410458305227404114613997451057319845555104920222643735127910006662079037452269829201400928827875602418145112307577906212798663624165774372362963402146294586328840271368475304673776685965159611477161781299697854936573662298300221172525079783421578897633091762474816136338251372696426937027106106127331874490059729264888151
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							01e8946b1b0e2afbb7c3b7a733bc07a954e4fc93
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (144 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.koulia.fi'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'gedu.demo.koulia.fi'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'koulia.fi'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.gedu.demo.koulia.fi'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.gse.koulia.fi'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.gtrainerdemo.koulia.fi'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.koulutus.koulia.fi'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/63.crl'
 . . . . . . . . . . . . . . . . [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)
							00f1007700ed3c4bd6e806c2a4a20057dbcb24e23801df512fedc486c5700f20ddb73e3fe000000196fd2202250000040300483046022100d899a52c72584728f997e5ae57c74d2825d42a613acfd7562c3703167cb5cacf022100fc717a9af39a62d18bb9f6ae12f64ac9343a70a720b000ee8702e3971475d3a900760012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a00000196fd2209fd000004030047304502204f8a192ec29abd761badf602fc092e83e342e651c8ed9eab60b425bab6810a16022100a5f7d0e50a4de1018fd402bc2d0457c2ffa4791ffdbba99a5623aead017d191c
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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