optica.africa

Issued by R3

About this certificate

This digital certificate with serial number 03:15:30:f5:c3:e6:0e:03:ba:2e:d8:a1:40:16:7b:b5:a1:bc 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:
  • 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=optica.africa

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:15:30:f5:c3:e6:0e:03:ba:2e:d8:a1:40:16:7b:b5:a1:bc
Serial Number (int): 268547866530445152053766751834631415636412
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d8:5c:66:2a:20:10:cb:2a:88:29:9f:58:5a:44:8d:06:55:37:97:dd
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 81:69:c2:ca:b7:6c:84:b7:79:2c:c7:96:aa:0c:72:b8:8a:62:65:17
Fingerprint (sha256): 3e:d5:c4:b8:e1:3e:d9:e6:3f:20:29:9f:a2:62:02:43:23:fb:f4:16:c9:76:62:db:d4:d4:9f:b8:7b:e9:95:1f

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

Revocation information

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

Check the revocation status for certificate optica.africa

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for optica.africa

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

optica.africa

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Certificate

The complete raw certificate details for optica.africa in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4WQF/Djj7C6sbfLt43Hy
cBUqK5c7Kk5x6kzr6C9xxQ/an61VS9scjC1NSQLvJJFdNbIUT+pBKaoOY2176xkZ
eLjTF9Dc8sUCJjslhhCIlamrZBKjB+wMcYlvJVRUIchWGGT6bsyw31xrxcCFER/N
1K7AC+BLGfwvLL7p7ejzEFv0MfO9h/jx22BwiSe9XPerRkGttRJTJYfBnztDrrnz
8fbHdc6zXQZK/UaBL8S7YNeRMWeoFK2pnck4+VYk+73ovUC5MQiBzucHoJH8sQdC
buLIBUC2vqrv6IpgM7IrMBovzH+ozGZQF4WvPt+HmOg7p1sx8gqSsuUHiIORA/1T
TQIDAQAB
-----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 268547866530445152053766751834631415636412
 . . . . . . . . [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 2023-12-03 16:00:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-02 16:00:03 +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 'optica.africa'
 . . . . . . . . [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 28452941984277130525922709504942630443950047894647561209451577749541528298143624394961694911277043541492035113285907018526671767601494352761206964744916559239964698004094651862051029622019940633215341608504990314175106326783155729244429275988838204975310586289798032858529397310375082991864142074836070311761371468201279821789526439852466514973491511314099132695168816478568198304189971850142246006587338937381544406603311402335465017386851337084258047388598600316975767994657427429053872617139935936790117276661257768593283950955527155434742252512124497063324227373673084178016354795884338650149403171266244013544269
 . . . . . . . . . . . . . . . . . . . . [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)
							d85c662a2010cb2a88299f585a448d06553797dd
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'optica.africa'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c309f6fbb0000040300473045022100e7c0a8a59abff6642baf818a31695c6b44bf8127eb84eccc2870a1231f46094502207a2dbd400ccf66d16fd943af74ee9418305aca393176f2a885acdf47d18c624f007500a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018c309f70170000040300463044022027f38994dda0cca95b83d16601821f0b3ca6e64706568ff8060eb4d2d5ed7224022048940270924b5a37e45d25cd9484a80e42e8fd5769a3258582531caf685a493c
 . . . . [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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