DV SSL/TLS Certificate for karacho.co.jp

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the karacho.co.jp DV SSL/TLS Certificate

This certificate with serial number 05:eb:b4:b2:f7:c4:c5:6d:1f:60:2c:b8:8a:c4:66:6d:f3:6e for karacho.co.jp was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for karacho.co.jp provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:eb:b4:b2:f7:c4:c5:6d:1f:60:2c:b8:8a:c4:66:6d:f3:6e
Serial Number (int): 515767976178648868626228112692895049184110
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 42:46:32:a3:19:2a:51:fb:9d:b4:51:84:15:df:c3:ec:a3:92:c4:4c
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): 28:e4:9d:af:81:f4:68:2e:48:eb:0c:1f:07:8f:19:7f:b4:c2:ea:03
Fingerprint (SHA-256): 89:35:ee:a2:6a:37:40:9c:1a:bb:26:39:70:1f:c1:7a:76:d7:fb:0e:8a:26:3a:56:87:c6:e6:08:24:00:b8:6c

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/111.crl

Check the revocation status for certificate karacho.co.jp
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for karacho.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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for karacho.co.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3u93CEMYZpmUvEZxIF23
iSla6tY8JCUUBq6lJwdzeT2EkfyLDBLsrs8d/mKuhT3lLyECWZC1CczJnFfaipye
ONqge4ZfnLVHNr2ypnXeJ6n2TFOnowUl861UCqvhduwfcyEMH4qO3JivXaOOhCrp
FhhJmHD8jx9gZ8LOSqYKl3m/VQpXC4R3j4Axytl/cGNfADsnxnhcZHTtqqIlAM47
8M2Q5EHPI7Jv3N4fAhIuSPrK5aXleb4/6DD+zRsMdVEMVd/42Pp8Go6NjjhYzW0I
F22GU8CBmeudJAG6p5JVEsTb1c8KIyvebj1ilzEtEFdFZ1xLjLspVwSthE6JN5Pn
zQIDAQAB
-----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 515767976178648868626228112692895049184110
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-05-22 17:06:43 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-08-20 17:06:42 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'karacho.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
 . . . . . . . . . . . . . . . . [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 28142988280155493400496179376130623099444103621810604172931052915299489415310850985663514732469438494779446133746577898716077905163879084229211095800743444097639562179408881795444432458249139368650002325462130702005507284872227791017883198346337449941844910394702584390119960771543758673378268265810831201549149182206261773082723702559346934779642148449979036724441319305970606196090177079671316888382667788959391968015950584325865452455906771148432325021174987070988570123763485018752269450135495440017417888107704450080143637524858857374663119761723481364311683203789002314801395350870483343433586178921742915069901
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							424632a3192a51fb9db4518415dfc3eca392c44c
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (36 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'karacho.co.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.karacho.co.jp'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.c.lencr.org/111.crl'
 . . . . . . . . . . . . . . . . [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)
							00f0007600dddcca3495d7e11605e79532fac79ff83d1c50dfdb003a1412760a2cacbbc82a00000196f92bb8040000040300473045022100b106f784ca5718fba1bcc3efb70dce5ce2d2fca89684d0f74af2b4f84cb4187102203346c5d35eb091f6d22ac6ced15e08a20573afe71dc9e20058f936c1fe87d889007600ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db000000196f92bc012000004030047304502204a5f9784427b267de8204f3ceb43b97733ebde4d59c179564b347dee83120bdf022100a2ffd5c4b6b58ad1ee72d7ae297b61284eab1bfbed08a741ee45a190d70a9567
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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