www.chiba-kosodate.jp

Issued by R3

About this certificate

This digital certificate with serial number 04:f1:c7:53:fb:97:2d:79:db:57:60:dc:fc:32:8a:35:e1:f4 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=www.chiba-kosodate.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:f1:c7:53:fb:97:2d:79:db:57:60:dc:fc:32:8a:35:e1:f4
Serial Number (int): 430722146589649950128069335536667412783604
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 75:9a:fd:3a:60:a2:ce:4c:2f:33:c7:f6:27:c9:69:70:56:5e:e7:95
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 87:d6:5c:bc:a5:cc:55:0d:ab:72:50:1e:5b:28:bb:c8:5f:10:f7:52
Fingerprint (sha256): 07:30:89:31:28:c0:75:e1:f2:2e:88:67:4c:2c:e7:3e:7e:19:00:62:65:63:5a:f8:8f:dd:55:5c:cd:3a:95:7d

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA29+9yWDkXLx7eKmllOAD
l3kkwCRfrBVAPs75zTu2x7UsAYwRfgP45IkaaIsNnwhRxNM81EbfypyNqSQnJLLT
NXhFeDL2gau/dN+laS9IIY63/wJ+lFW1rRnQ0OrJoFthSxl41DzGW8A+iPJFWA4z
ICpyiYNHQyvLzoUYsWnUBxV6UkEGDaVVNUqYtHhdOLuli/hHjdKquLI6FobvxHvB
aWCueZRa+wpaNGs+Z793iDnHyV+xUUZH/IamXl6ORSvDSj/thqwRzoXanYLpQo/e
BnOOuxFRAzNE+K0KO6EeadowHDFYe3yXc2okhMnv6lKhIGfvQjbGl08ucQWG5wXN
kQIDAQAB
-----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 430722146589649950128069335536667412783604
 . . . . . . . . [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 2023-08-04 11:07:25 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-02 11:07:24 +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 27756519761336564102869878942016534071627367105777916262154048323328639948796541632313399701992612179256785219789224233957411390584387844235009256410571021263979914522286273265611177405502249650445473487402154056250272269916111944553326241223962357692713079692032785504352186261191587372664278380050708659655086912231639618134352723040600424557977408091126292339761014100200330225732596825749985970381731051996944240434683438610576416234573611428728774425259588355742628450267788642703563417732434788587439209701402788955763267636195046135267161793459639322583087656538230462858467628575962754960491058963854737657233
 . . . . . . . . . . . . . . . . . . . . [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)
							759afd3a60a2ce4c2f33c7f627c96970565ee795
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000189c072089d0000040300473045022065c56e8477a5edeb1bb8e929b0edc7aca8a46ace79dfa7f2c390af7a7bc5181f0221009ccce7f0b793bfc0a46d0325aae61cbb7082c8577a6bea9a514b52313e0120f1007500e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e00000189c07208a5000004030046304402201253e17ac76aa91a9174066672d2edb5054110a88c2472d937c1d91234308b460220232064025285dfec12bf4915fe782613cc828e269f9331dc79d21973923bf83e
 . . . . [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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