DV SSL/TLS Certificate for opef.info

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the opef.info DV SSL/TLS Certificate

This certificate with serial number 05:ce:26:26:b4:8a:07:47:12:f6:19:ef:da:72:44:9f:8e:4e for opef.info 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 opef.info 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:ce:26:26:b4:8a:07:47:12:f6:19:ef:da:72:44:9f:8e:4e
Serial Number (int): 505710308877404475235808357109666357939790
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 26:45:a7:16:7a:49:63:a6:4b:50:02:6f:91:c1:b2:1a:7b:04:fe:76
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): 6c:27:03:51:49:68:90:4c:7d:49:e6:05:ec:70:ef:73:c9:6f:ac:87
Fingerprint (SHA-256): 10:b9:f6:1c:f0:02:9f:29:95:ff:f1:5b:b1:89:16:59:0e:6b:01:a7:d4:3b:1e:d2:f5:1f:4b:92:2b:de:63:b5

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

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/79.crl

Check the revocation status for certificate opef.info
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for opef.info

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 opef.info in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAswcp3NRw0yKtqalUN4Kg
EbL0tl2tRDQi0cuNkqM0xF6Fc1LUpE/IiCfhQaWaa9oK2hgbwYDNIxCkrdmD/1Vl
3dtuFrD2eUib8SamLoniNOT8AHqOLR7nBEyyXOpau4t20z9pXxjmPgtsDAEYVURj
5RAeZ3fKuj0AKT4esmAwhDd8fNmQ6vJ6Syne+RQFaqFF++NWvQlacFI2Qs0CnN9u
GkxQWAJLpS8WaBqXsyU+fj7KJ/uTLd+pqwuzRgOQjRzsBRCDQgHa0oBBa0G937of
p3OEWMqXlHl8ShH6YtmI/A+Nz4q/8YLq90S5LO33zj0/Mu0g55s85ZNdcxulLe1H
iwIDAQAB
-----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 505710308877404475235808357109666357939790
 . . . . . . . . [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 2025-07-15 10:58:21 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-13 10:58:20 +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 'opef.info'
 . . . . . . . . [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 22600189055175999587399152088305895230124679013890061467663500484195807379824224171317240684117391166803807670133958298906980718917375505049670796121505060453559726077649171790905083486538919388627413232351268739674769681077249155330100824583084527958567895681647096459327844882280946407912909018010649165749632824290258568615210754802789923257109130484922521711265797936856898610526458326800109664423663162343601228130781783729306307245632794821783228308822034637142416554270666074510141097575793646599479660805127857748440665659378949127978989912111111359887673837820088514919828749201475800455825319529040699017099
 . . . . . . . . . . . . . . . . . . . . [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)
							2645a7167a4963a64b50026f91c1b21a7b04fe76
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'opef.info'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.opef.info'
 . . . . . . . . . . . . . . . . [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/79.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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee0074000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa34000001980df1dee5000004030045304302201b5154b1fcb8d38daedb7326075d770b33d95bcdc07d74f0c6c2ea092a174f85021f246a959ec657a9d0806ece5e46aa0359bea86374a5f1bd94f28e8d9faed78d007600af181a28d68ca3e0a98a4c9c67ab09f8bbbc22baaebcb138a3a19dd3f9b6030d000001980df1e02d00000403004730450221009242bde6cd19925b7960133bd2838275594666043b85e38b4fe7b561fd67583f0220363f3e451a571b196110769ec8e1600556345f4307426a006d5f9cc7f46156b3
 . . . . [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)
		0051422bd7ad21902dc53486990376a8529f840573b5f0994538c161544d9a241634956c20372c57d9b5232bcaa8447096adb278b14df9fd44a123bf732f6d7e5230601b93b92f954225c1f228be25210610e5ecc026ce2928d76b48838bd2d8eff8ae865bd63db5edf2f4e614ece1bf43b2f486010e18bcba078a2791bf303c03be9d67b846007afb5b6c8f1d67a0d1cba07258ca795741d0b8d71d3993eef927e6a3bade1702290c56d7fe352fa8dd903a54000d775bb485ef640f68212af9f9db271ed4bb433e5d945504964b399c703cf481df932f7c7afef91e212541fd496dbb99aa43404a2788b1ec1515e4c1a35b0a706a68caf8a5fd1f5c7387b1e8f0