about.belong.co.jp

Issued by R3

About this certificate

This digital certificate with serial number 04:38:42:0f:29:14:43:75:ab:85:1e:30:43:16:02:3f:c7:4a 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=about.belong.co.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:38:42:0f:29:14:43:75:ab:85:1e:30:43:16:02:3f:c7:4a
Serial Number (int): 367592764039972457760433615259553820034890
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 95:9f:44:f4:72:4d:ce:73:53:76:0a:7c:ea:48:32:39:35:e6:ff:11
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a9:bf:ad:ca:8c:c5:b2:24:2a:ba:4d:6a:fe:b5:03:21:5a:2f:a9:08
Fingerprint (sha256): ec:e0:c4:67:a0:21:aa:0a:85:db:c6:94:3c:69:2a:95:2a:89:48:19:60:22:55:65:c8:d1:e1:b9:ed:6d:6a:4a

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

Revocation information

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

Check the revocation status for certificate about.belong.co.jp

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for about.belong.co.jp

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

about.belong.co.jp

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Certificate

The complete raw certificate details for about.belong.co.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzaBRp5zT3nnv0MutWfJ+
uzEDxd0pWCYEhwHdgGMYlATciTDw4ypFVhaznbeul4YjYc5kbUuSTX0kxa7OyIH+
NHNdc34K6KixeVFcVHAH8Vn4A4Rp7V0Bd7cfFKFlSsvBcM1/tsIWHs0MZz+2va9G
P1ecgJWBPtUduNcBj0oF9khynrPnLEkaITMpjtS/3wWqb9K+bG15gtA5M9g+Me74
1RA4CpR/nzqNbvLPC7oSZH1nqKWN9CjBsUofsMBt21GWcbMoTmzm7dHetj+1+dEc
rqToLkOr2fYAj7ZSy4rhOR51cG9Xmvcx8Jxz3bRWxhxX03wcsC4A/2dfGwy+kHzo
AwIDAQAB
-----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 367592764039972457760433615259553820034890
 . . . . . . . . [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 2023-11-22 03:21:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-20 03:21:54 +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 'about.belong.co.jp'
 . . . . . . . . [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 25957908745565355339497764657720915794325228058063027754029398838426333410460500184502104045262138777433683725440083174011888320924499700618521887924931840798125395286559371730809229312943063889295364290995265917765186020939430158431621274224004912565821171336853506984001513193915623951251093332177819624726347069970136286775179274261615528513072969395578344250575944342650494434502736290732548186441088010981850127581789192132981900484119850808478671207341839775976836623331034889898391200069732223526895748276272872858172401090026980266864816637386617698284347518541635430144363521438449871014683001848792780433411
 . . . . . . . . . . . . . . . . . . . . [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)
							959f44f4724dce7353760a7cea48323935e6ff11
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'about.belong.co.jp'
 . . . . . . . . . . . . . . . . [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)
							00ef00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bf543604a00000403004730450221009b4f2a81f348110f45d672619c5156d5b9feeee5fd165d13f611f7c5ce0d447b0220721361d6f8ab4c9d78561380d2d01c4f48bf48d9fa56a722300465f2f9824d0d00750076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018bf543607e000004030046304402200866f8f74199412d5d22833f6d4028ab9286cb63a1a5ec3b8ffc09b7a04c4e3b022011d9c7aef361743231eb4f5a1b3890b2bf99063076300dd22e73da3910efdd67
 . . . . [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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