DV SSL/TLS Certificate for k-partners.co.jp

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the k-partners.co.jp DV SSL/TLS Certificate

This certificate with serial number 05:fc:b8:9e:14:4a:ab:d2:c0:5a:0a:6a:73:04:0d:e5:dd:b0 for k-partners.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 k-partners.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:fc:b8:9e:14:4a:ab:d2:c0:5a:0a:6a:73:04:0d:e5:dd:b0
Serial Number (int): 521557984868570051867815367659081305546160
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 3c:ed:fd:9f:ad:66:fe:96:32:3f:b7:02:ce:48:73:b8:ad:10:9d:d7
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): 5d:26:56:39:f5:2c:0c:8b:80:b0:2a:74:24:e6:a3:a6:bb:40:e2:a7
Fingerprint (SHA-256): 81:3a:76:9d:fa:97:2e:d9:44:c3:15:a0:48:b8:c7:fc:55:15:e8:21:ff:8f:e4:47:df:91:3f:43:02:c5:1d:47

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

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/49.crl

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

Advanced Certificate Properties

Technical details of the X.509 certificate for k-partners.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 k-partners.co.jp in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFEDCCA/igAwIBAgISBfy4nhRKq9LAWgpqcwQN5d2wMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNSMTEwHhcNMjUwNjA1MTMzNTU5WhcNMjUwOTAzMTMzNTU4WjAbMRkwFwYDVQQD
ExBrLXBhcnRuZXJzLmNvLmpwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC
AQEAwM8zxVysHIhNZrXDAvewjrpIefZ9FzB6153e43krGRP5d18Q8G7nGKFyLPjQ
uMQ4SGR/MXrAcw620wirqVnDsSkg+7ULG33qZTKTn4N/eBldBNCz1AFqBRxAkc5F
nwGFU4x6r7+GFPn1SeCsgrRaT5Cf9udzIWRt8V+MXvbLhdVksqeT23p+3Mr31sRa
hIJTH6k3iSSfoxyekiE6C+FN5MQs7td59MxUMALISczJxxz2UjGZe9yX+2f/pyK0
gjUaON7b2R74B2ViFlzx6OXky+8m7+L+hIgVysa14q00/VZFivVeGuaKvcrF6eaS
2flQ/KANx4iS018vpwQYkdT/zwIDAQABo4ICNDCCAjAwDgYDVR0PAQH/BAQDAgWg
MB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0G
A1UdDgQWBBQ87f2frWb+ljI/twLOSHO4rRCd1zAfBgNVHSMEGDAWgBTFz0ak6vTD
wHpslcQtsF6SLybjuTAzBggrBgEFBQcBAQQnMCUwIwYIKwYBBQUHMAKGF2h0dHA6
Ly9yMTEuaS5sZW5jci5vcmcvMDEGA1UdEQQqMCiCEGstcGFydG5lcnMuY28uanCC
FHd3dy5rLXBhcnRuZXJzLmNvLmpwMBMGA1UdIAQMMAowCAYGZ4EMAQIBMC4GA1Ud
HwQnMCUwI6AhoB+GHWh0dHA6Ly9yMTEuYy5sZW5jci5vcmcvNDkuY3JsMIIBAgYK
KwYBBAHWeQIEAgSB8wSB8ADuAHUAzPsPaoVxCWX+lZtTzumyfCLphVwNl422qX5U
wP5MDbAAAAGXQIPXFQAABAMARjBEAiBLqvgUiDnP/w2SiOzq1LwqIbKtIla2sgCr
5Vb82WL2qwIgTyVChTv92VfNgcE0Si7qUWXaoeNBh3ihntR3/j9f9vYAdQDtPEvW
6AbCpKIAV9vLJOI4Ad9RL+3EhsVwDyDdtz4/4AAAAZdAg97WAAAEAwBGMEQCIHWi
eeUwUPt2e84ZZcXL9Xyy6s8+XxhP2SeQRXQCBh3WAiB5o/4HRqEtQslkepYakEPI
9NrkmVSEIztBu9ChnWjpoDANBgkqhkiG9w0BAQsFAAOCAQEArjWu15E096RhoDJd
4HO9lmz2vzsGWtEzYFWyLC8mrk6K/31MsFPaEHbFVyLNJyPfsQh9UXD2nRwhygK/
wfph2SYPZLPhD2m6FVUaH2guzw2lnJVqKF8fMyccIwify694UG0bSfiXNsoh0zM3
Wf2NOXonkd5tnA8vUag9kt8Hp9xdcL83MXWZROR0QqR2Tl/dkHdRZRi+/EzZDd3g
+3pSPgMzuVsU4zUWNhn/CVLja/v5E+JdFCFvXz03D+q01Wfw0XqRpMvV8x6L/xk4
S2wAoDz4xlt1cfURzAL8pntF6JptHHOwZCelu+9cdpZoF3IcCooXZ5r3koaZ4aQA
Kkjxvw==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwM8zxVysHIhNZrXDAvew
jrpIefZ9FzB6153e43krGRP5d18Q8G7nGKFyLPjQuMQ4SGR/MXrAcw620wirqVnD
sSkg+7ULG33qZTKTn4N/eBldBNCz1AFqBRxAkc5FnwGFU4x6r7+GFPn1SeCsgrRa
T5Cf9udzIWRt8V+MXvbLhdVksqeT23p+3Mr31sRahIJTH6k3iSSfoxyekiE6C+FN
5MQs7td59MxUMALISczJxxz2UjGZe9yX+2f/pyK0gjUaON7b2R74B2ViFlzx6OXk
y+8m7+L+hIgVysa14q00/VZFivVeGuaKvcrF6eaS2flQ/KANx4iS018vpwQYkdT/
zwIDAQAB
-----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 521557984868570051867815367659081305546160
 . . . . . . . . [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 2025-06-05 13:35:59 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-03 13:35:58 +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 'k-partners.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 24339929781344960750167888269687690381344379828898522869089962832242545139567741236450709689151031293991625286248810184047203609776339346478959192685768337186404612741553686356103431431078475487900633919616218611831633206662397672024391791773056475188666548550058147878112418795567233483720083520189246847050694931596832533217909113744269285249937399884559732925747472441672805033789550141117529802140112031234336915675480908565724015308153542373649868371507273241093933854844700304719806231496675765215092524876248588937566889759314412034847312416097041141827820956313496160119029093873475907592129266832008400928719
 . . . . . . . . . . . . . . . . . . . . [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)
							3cedfd9fad66fe96323fb702ce4873b8ad109dd7
 . . . . . . . . . . . . . . . . [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 (42 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'k-partners.co.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.k-partners.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 (39 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/49.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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db0000001974083d715000004030046304402204baaf8148839cfff0d9288ecead4bc2a21b2ad2256b6b200abe556fcd962f6ab02204f2542853bfdd957cd81c1344a2eea5165daa1e3418778a19ed477fe3f5ff6f6007500ed3c4bd6e806c2a4a20057dbcb24e23801df512fedc486c5700f20ddb73e3fe0000001974083ded60000040300463044022075a279e53050fb767bce1965c5cbf57cb2eacf3e5f184fd92790457402061dd6022079a3fe0746a12d42c9647a961a9043c8f4dae4995484233b41bbd0a19d68e9a0
 . . . . [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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