www.chiba-kosodate.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:e2:7a:f7:66:37:c5:f0:51:87:22:fe:3d:c9:33:3d:3d:80 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): 03:e2:7a:f7:66:37:c5:f0:51:87:22:fe:3d:c9:33:3d:3d:80
Serial Number (int): 338404123105447238106403822664098164587904
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 7f:97:7a:84:df:c2:5d:17:14:21:7c:06:6e:83:e0:e3:d5:2e:86:04
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 49:78:1d:be:4b:cd:64:8a:6b:69:56:d8:2a:df:de:e1:a2:1b:ef:48
Fingerprint (sha256): 2d:3a:a2:b3:73:59:06:bf:20:df:10:2a:c5:b6:05:22:a1:b1:6e:43:a7:31:9f:7c:d7:17:f9:64:6c:76:91:99

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuEsNOI9a11W2iEYz0sBS
xGx0IyR4oHqGP+GCGWwJgSgpCk2XgJ4eF9+3MxDMnI9vfxrbTuY07Q+5O7hYOcuc
CxiBsiboIlhZZ/6Or4pq0gE5n1ddreXWIRz0lM1T9tcl4ledcP6BmmuxhTSrMbXK
rKu33GfcNBFa1OQ4Y67kv/CbXm/kWHJ/9nG5+J3XD4FoeYjsjiK2tAupwdqkZs2L
GI+IrzWicGSr0KXPjn5nONXuU5oQ81J0qKu2Ed0HL8n+TZIZwZchxXRzO4iYLXhr
8hY0vwy3gjnMsF9kKzV3F4YirvhTMcBJCNNg8Hx0FFdwZyLBSD6qHNk+9ZorYstX
EQIDAQAB
-----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 338404123105447238106403822664098164587904
 . . . . . . . . [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 2023-04-05 14:14:15 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-07-04 14:14:14 +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 23264857458909792360114652152354107181682931812009935040873618211196863122064911272244858585419568907592926745972400530652174116845174930141351854616963260035606538076239661951932637263406408865894129829154908317466743727280091864853549817130995540177146277610700191816890526342482958255340646637293737518371102749329034657739325167924820959004149392113474336966749849967163884814569339775060503588772019710179996692001258356434132162073651017100692454014150139308630440680843419028124552713579566791493424271015433181625834076414640321376346088420561823558044191197175709841286302923255404533829200883114462000404241
 . . . . . . . . . . . . . . . . . . . . [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)
							7f977a84dfc25d1714217c066e83e0e3d52e8604
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018751fb98360000040300483046022100d49a2269bdac113ab80562528cdc403ecad2b7512a2634f43b2b40843eafaed60221008e1469ef57f2c84053ac987517e757eb3410c7761c319d76d865222264b0f092007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a0000018751fb994a0000040300473045022100852b47a50611e4d3114a1a65ecf911c0d18b2998cd3059cd7bf698a8e3d4115502204998cd2461ffa0f3202df543c9c00d76dceeb58ed7c30b836e9e70a6d5333871
 . . . . [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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