www.chiba-kosodate.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:86:91:5d:c2:79:ef:85:5a:2c:e6:b4:d3:df:e4:7b:41:a1 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=www.chiba-kosodate.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:86:91:5d:c2:79:ef:85:5a:2c:e6:b4:d3:df:e4:7b:41:a1
Serial Number (int): 307127919850131349487477022917639605535137
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: fd:4f:33:68:c7:45:8f:6c:f3:ed:99:ad:bf:45:04:9b:63:81:16:eb
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): d4:3c:72:4c:c1:8c:51:c1:30:b4:10:89:fa:62:29:63:b6:bf:cf:46
Fingerprint (sha256): a9:a7:5e:ab:7f:4a:b5:fd:d7:ee:c6:12:c2:9a:cf:8f:d6:64:d2:43:ab:18:35:f0:d0:be:62:86:44:30:de:09

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

Revocation information

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

Check the revocation status for certificate www.chiba-kosodate.jp

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.chiba-kosodate.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

chiba-kosodate.jp
www.chiba-kosodate.jp

Other certificates including the domain name chiba-kosodate.jp

(limited to 100 certificates)
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp
www.chiba-kosodate.jp

Certificate

The complete raw certificate details for www.chiba-kosodate.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAus7ToyRc1jDRYLRi/kY6
s1J1f/eIzUECi9X8yzYiLiyO6mPsWINAj9+XeVMaZdCnEwDXlpyp9kV5vWV+8d7W
/I4zhaFoWCmO2h7Dhnp99hfL5CzrLS00qHhYrAWowSovLJhMt+1gqd6/lINZe78g
mCGtbuY9P4G2+uUJE1fvzpOGM7BaNV+k7GLdefpjDoQV0zSasytQGa5FaCymEcvr
OdiAKtJ6Y8cDaRBKEBNqw3JPcpr6Fn/SO1WfhhVzHEy0v0Zd2Rqz61WqupOhgW84
W7SZRb7vokXceG7/jO1Y2iw3nrQt7mqsWNdurhgXZ8J6V4ecRtSEu/4rF+twdP04
0wIDAQAB
-----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 307127919850131349487477022917639605535137
 . . . . . . . . [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 2024-03-30 21:24:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-06-28 21:24:40 +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 'www.chiba-kosodate.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 23582314774672269912243058941429021329678994665418348121509142507184969707595838804688220340254801279850315539970645551812668890265756809229957601941884635352238155730484509245328949487063292328212346543955436211966521213381448057908049848097386501919554570884333284190555797728064454281858780409649636965601934339537936289538988496627068639501211685477216683339680147783939869394690858515177211347097773471850974314947923133682074554952902008013177747731903179198636877664481898565932467398404648494924350907799898688329455087386212768028193290729568216328918714413818656795307669230769207430309196266404745253304531
 . . . . . . . . . . . . . . . . . . . . [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)
							fd4f3368c7458f6cf3ed99adbf45049b638116eb
 . . . . . . . . . . . . . . . . [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 (44 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'chiba-kosodate.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.chiba-kosodate.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018e9177093400000403004630440220674d07b6de8b05bc0955c1010d1086dc0d162ef7404a8f680a463a4fd16e092c02200db0669afd0499b2affc3e3d3d6d95a3d92583bcfa4556b232d64ef80bc04e8c007700a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018e9177093c00000403004830460221009dc7a780f77cfd38fa977e5331c56e21e5984c73331462b10ff3ea81b22b2b05022100970e74a5cd990cc1ac0c2427294f5eabe41bb714287994dbfadcf7ad468b896d
 . . . . [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)
		00435d4e678dea3ac652ad769753d9843f6ba9c3526bfb62be9c2f7edece7bea92e7afb7e1b683f83fb6b1302ffa453c37206bcf171851e7753c370cf029fcbe46a399e822d19f4225827de6b97ec67afd2dbded12d2e7157506a7399bafd1699b74fe89ea00009424d9126a60b6a0e5b1f07cf49d0b9566fe87bc9e38c012a6add93d1c9516bd48f1e3730990de4035f2c2f6c09c4983d8ad2f67eb82f80012fae402ac6c8b1536ad3d75271cf46ff85ac7aed2009fc9eed4108e2e8fecb9a86f3ff43ae2b26a859c7c4c7292c5999c6fa8999c2f6029fd79f67d8d20b7e338c79527a6b015a7c5e4ea98127459556d9405773f7b068d5cba989202f21007f306