DV SSL/TLS Certificate for klufsport.pl

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the klufsport.pl DV SSL/TLS Certificate

This certificate with serial number 06:3f:00:83:ed:d3:6f:a4:a5:3a:74:28:c0:17:dd:82:73:8a for klufsport.pl was issued on by Let's Encrypt.

With 2 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 klufsport.pl 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): 06:3f:00:83:ed:d3:6f:a4:a5:3a:74:28:c0:17:dd:82:73:8a
Serial Number (int): 544112189721151841376504337568848744182666
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 51:bb:b7:50:3d:49:b2:36:54:c1:7e:45:09:87:a8:57:e1:51:19:a9
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): b0:fd:69:4f:81:7a:e5:b0:35:24:d3:70:cb:45:3a:ee:72:3f:ad:af
Fingerprint (SHA-256): 40:c6:2d:3d:a9:e8:35:17:d3:2a:cd:ab:b0:c6:f8:dd:41:04:fe:9b:cd:f5:85:bd:a2:2d:c5:17:4c:ec:28:d3

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/11.crl

Check the revocation status for certificate klufsport.pl
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for klufsport.pl

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

X.509 Certificate

The complete raw X.509 certificate details for klufsport.pl in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFAzCCA+ugAwIBAgISBj8Ag+3Tb6SlOnQowBfdgnOKMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNSMTEwHhcNMjUwNTE0MjMzNTUyWhcNMjUwODEyMjMzNTUxWjAXMRUwEwYDVQQD
EwxrbHVmc3BvcnQucGwwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCh
CnrdUQhdOJBedw1n414ASlSR78rFo2kWLgBMhWEMdZzajBMoVihZ/9gSkJPDp2Kd
6QW+dInJ2aAY1rSBZfHUkIYa/ROis5AJzNYaj7zwPRfEpCXOldbQEp0FW4qMs+9J
4d6arb5F6GOjka7diopilj4MpR4o2nM4OxYkb2sh98SIFvTQezFXosZ+TgL3APha
he1N4bUL0/8krNwVardsnWl/Wd1wZO42VBad+X2bn1YnryuCDcI9AVfjw+vfJ0r1
SuE+do/lwFDvKB3ZyeZc6fgg1PXBqoXJqv3La0LjQ/G2qOTBRBbXZkj5/UePpN1u
FvM3TPofRLDK6hJcS2bzAgMBAAGjggIrMIICJzAOBgNVHQ8BAf8EBAMCBaAwHQYD
VR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0O
BBYEFFG7t1A9SbI2VMF+RQmHqFfhURmpMB8GA1UdIwQYMBaAFMXPRqTq9MPAemyV
xC2wXpIvJuO5MDMGCCsGAQUFBwEBBCcwJTAjBggrBgEFBQcwAoYXaHR0cDovL3Ix
MS5pLmxlbmNyLm9yZy8wJwYDVR0RBCAwHoIOKi5rbHVmc3BvcnQucGyCDGtsdWZz
cG9ydC5wbDATBgNVHSAEDDAKMAgGBmeBDAECATAuBgNVHR8EJzAlMCOgIaAfhh1o
dHRwOi8vcjExLmMubGVuY3Iub3JnLzExLmNybDCCAQMGCisGAQQB1nkCBAIEgfQE
gfEA7wB1AA3h8jAr0w3BQGISCepVLvxHdHyx1+kw7w5CHrR+Tqo0AAABltFdHOkA
AAQDAEYwRAIgSnMgyDYIjFkuy0LRiXqARQ8J6R3Ez2kIEueYcZxsypcCIAtvNk6P
ASt0SShxvU3dXTtKtf7toqC2/OB4gRb9OF2kAHYAzPsPaoVxCWX+lZtTzumyfCLp
hVwNl422qX5UwP5MDbAAAAGW0V0c9gAABAMARzBFAiANJSfvicpO4TJqyJvkbgXV
Yxwreozec794Eb+DScWBnwIhANxi8UQU5QvWMO6iz7Zm3CnCrGTMeGWFefwOh0dK
FPINMA0GCSqGSIb3DQEBCwUAA4IBAQCF38cYvnaSOY1c2hwuVr98OD9bKKizzZ7V
sfx7i/8wlZ4E7bFlioal8aO8AEpBSEtDQGXzAur9QbB91hT/+AS3gHAU+o7keNOu
i7HJ83hi78yAH8OGtKVXZo3023noUaah9FbbNo1vVBN4xvYc5g600wF/XjWzTdfx
0pX8eUNNI8t8QZrJfmpltLMi08eHo1RV+Kxe2cmfE3Zd+fnGhiwU2NKuB3UXUsZF
mn32s5tQguXmQ22CIaVmcMLAEY3RIunGcaFgNarJw7NiC2GLqZTtSNAqiXEfUzBN
Jt51fm2mNWsrc7nIwYArDSoeai78JBoixJk3AtgpW0NOLAHT43Kf
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoQp63VEIXTiQXncNZ+Ne
AEpUke/KxaNpFi4ATIVhDHWc2owTKFYoWf/YEpCTw6dinekFvnSJydmgGNa0gWXx
1JCGGv0TorOQCczWGo+88D0XxKQlzpXW0BKdBVuKjLPvSeHemq2+Rehjo5Gu3YqK
YpY+DKUeKNpzODsWJG9rIffEiBb00HsxV6LGfk4C9wD4WoXtTeG1C9P/JKzcFWq3
bJ1pf1ndcGTuNlQWnfl9m59WJ68rgg3CPQFX48Pr3ydK9UrhPnaP5cBQ7ygd2cnm
XOn4INT1waqFyar9y2tC40PxtqjkwUQW12ZI+f1Hj6TdbhbzN0z6H0SwyuoSXEtm
8wIDAQAB
-----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 544112189721151841376504337568848744182666
 . . . . . . . . [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 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-05-14 23:35:52 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-08-12 23:35:51 +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:19|false] PrintableString 'klufsport.pl'
 . . . . . . . . [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 20329534950322324023800264211602433630632121333249110978604355449598477823293122660749940604500144665181888205669527963212392567231704157604022961054668664197620215439756991383220957394556718253553137163206687707377724253371568932341453598384265089592758336375163368648293829662050412639167646910054600790850045380494872359553572101005987177065683946162616798054505164011677590417224564142842533644693364308569827603537861705606916862331418738422767838309363445190948295224715892105033458939285733625914477241230744670776512511603414449212790304988386187289615526082328041948851915439359176874819060382972488452892403
 . . . . . . . . . . . . . . . . . . . . [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)
							51bbb7503d49b23654c17e450987a857e15119a9
 . . . . . . . . . . . . . . . . [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 c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [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://r11.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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.klufsport.pl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'klufsport.pl'
 . . . . . . . . . . . . . . . . [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://r11.c.lencr.org/11.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0075000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa3400000196d15d1ce9000004030046304402204a7320c836088c592ecb42d1897a80450f09e91dc4cf690812e798719c6cca9702200b6f364e8f012b74492871bd4ddd5d3b4ab5feeda2a0b6fce0788116fd385da4007600ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db000000196d15d1cf6000004030047304502200d2527ef89ca4ee1326ac89be46e05d5631c2b7a8cde73bf7811bf8349c5819f022100dc62f14414e50bd630eea2cfb666dc29c2ac64cc78658579fc0e87474a14f20d
 . . . . [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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