DV SSL/TLS Certificate for eetools.jp

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the eetools.jp DV SSL/TLS Certificate

This certificate with serial number 05:13:9e:6f:ea:4a:b2:bd:39:f2:00:d6:f9:2b:20:9e:46:b5 for eetools.jp was issued on by Let's Encrypt.

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 eetools.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): 05:13:9e:6f:ea:4a:b2:bd:39:f2:00:d6:f9:2b:20:9e:46:b5
Serial Number (int): 442237393750586426485622792326225959208629
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: a1:5e:1c:52:6a:83:51:b6:d1:33:c6:53:bc:0b:63:a3:1c:76:47:94
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): 05:56:c4:46:aa:ca:8d:ad:c7:02:76:97:fa:d6:ae:b9:90:91:7b:81
Fingerprint (SHA-256): 1a:b4:21:ea:25:eb:0f:1a:64:b5:be:9f:44:43:05:d2:3e:49:e3:a6:58:ba:29:f8:a1:b5:14:4d:95:17:9e:fa

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/54.crl

Check the revocation status for certificate eetools.jp
1
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for eetools.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

eetools.jp

X.509 Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE8TCCA9mgAwIBAgISBROeb+pKsr058gDW+Ssgnka1MA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNSMTAwHhcNMjUwNzEzMDkzMTA1WhcNMjUxMDExMDkzMTA0WjAVMRMwEQYDVQQD
EwplZXRvb2xzLmpwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqVTv
/6kWKpeAMErzwK5Hf82mvTn9DGrRl82Bggmq/EMAaTpi48i/noDe9XmGL9ejGzzR
0z6Rz3XvQG0l34plYcSvypzfnGpy7DBGKw24UoHcYnekxaluoO5w/K55F2/0wqWW
/S/B1AAPwXqDWR3j8f0H5QcpBgnrfP1EGSNm/YucGfMfGuNgFuJvzV4jTlHLX4th
JVIpGSbHszqpDW4jxwweEnW7DxCi8e2EAd8vdU2WGJZxmrkg0DlBcYtGUN9Z+dgH
oSNzC+HkeXZ5VlHHLFqj5WfkMZtEPvr79vbW3CQFxANfQGIFngySTHZeDB8qECgX
nEV0bqielyOLG1/R8QIDAQABo4ICGzCCAhcwDgYDVR0PAQH/BAQDAgWgMB0GA1Ud
JQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQW
BBShXhxSaoNRttEzxlO8C2OjHHZHlDAfBgNVHSMEGDAWgBS7vMNHpeS8qcbDpHIM
EI2iNeHI6DAzBggrBgEFBQcBAQQnMCUwIwYIKwYBBQUHMAKGF2h0dHA6Ly9yMTAu
aS5sZW5jci5vcmcvMBUGA1UdEQQOMAyCCmVldG9vbHMuanAwEwYDVR0gBAwwCjAI
BgZngQwBAgEwLgYDVR0fBCcwJTAjoCGgH4YdaHR0cDovL3IxMC5jLmxlbmNyLm9y
Zy81NC5jcmwwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdwCkQsUGSWBhVI8P1Oqc
+3otJkVNh6l/L99FWfYnTzqEVAAAAZgDVT+0AAAEAwBIMEYCIQDqicG5M1tzDx7C
35235phYbYUXQVycrX/qDYGxijmb9AIhAIlxo955Ivi1mhi31Jax1/oamyYXPmqH
YMriQQYtGFUoAHYADeHyMCvTDcFAYhIJ6lUu/Ed0fLHX6TDvDkIetH5OqjQAAAGY
A1U/tAAABAMARzBFAiEAv8G8I1y+AAThKUIPCZasXiGY0wQjAKJFybHdAMTd4QEC
ID2QkgzaNQUlFWpM1+SKb2T2xWT/8PzD21Tvaj9z06JBMA0GCSqGSIb3DQEBCwUA
A4IBAQAOX1uUo8U5+h/Z0YRPNTBEz0l+YHdxo5IhrsC6GMr8vcisLsD/DyfuNZ57
uypqIej0BjpaBXq5AjER2JlV89aQOia7krbTbo3aDKL7Gx/Ji0Q3TIqwDkqXNT9l
m+Wu/ID8jrluWjU7bXgFNw9ltGn5zleShowtH6uMWP3JpdtKN57QPqqWtRANMvdp
8LzEm/FvQGMzWVWrky3hc8MUtxzxHEHIWOpl31Qxvsnsqr7x2bEQFhnZv4myxCod
K+pPhH1TYfIzHpbOEnkK/6uL1REhjSnWy6Uf6dIB3q7qH47ofE72BtuKFOjzuKX5
PKVTOEyAqFTGXfPrR5YmsI+kHk7R
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqVTv/6kWKpeAMErzwK5H
f82mvTn9DGrRl82Bggmq/EMAaTpi48i/noDe9XmGL9ejGzzR0z6Rz3XvQG0l34pl
YcSvypzfnGpy7DBGKw24UoHcYnekxaluoO5w/K55F2/0wqWW/S/B1AAPwXqDWR3j
8f0H5QcpBgnrfP1EGSNm/YucGfMfGuNgFuJvzV4jTlHLX4thJVIpGSbHszqpDW4j
xwweEnW7DxCi8e2EAd8vdU2WGJZxmrkg0DlBcYtGUN9Z+dgHoSNzC+HkeXZ5VlHH
LFqj5WfkMZtEPvr79vbW3CQFxANfQGIFngySTHZeDB8qECgXnEV0bqielyOLG1/R
8QIDAQAB
-----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 442237393750586426485622792326225959208629
 . . . . . . . . [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 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-07-13 09:31:05 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-11 09:31:04 +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 'eetools.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 21376157779006423766081206591776830148990885617370704951892642321624720960751641514177405449359984954707726245274691029756864629191738862070135692179147347256162694615553240431245441039043387688618698437744837078296167029531781140357973432598960950114874297178519572707903630507740476063595409995352136304188286528868872535010299856020454106809448373709267409618052667082778721969010730465485047388073949503933117851235317339556494433659281708863401655785890709497907508667721074237398293429750760616239552290189109551508341316620742145191904167631830782783327599047580158593103255339319611874505789573474800451441137
 . . . . . . . . . . . . . . . . . . . . [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)
							a15e1c526a8351b6d133c653bc0b63a31c764794
 . . . . . . . . . . . . . . . . [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 bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [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://r10.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 (14 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'eetools.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://r10.c.lencr.org/54.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a84540000019803553fb40000040300483046022100ea89c1b9335b730f1ec2df9db7e698586d8517415c9cad7fea0d81b18a399bf40221008971a3de7922f8b59a18b7d496b1d7fa1a9b26173e6a8760cae241062d1855280076000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa340000019803553fb40000040300473045022100bfc1bc235cbe0004e129420f0996ac5e2198d3042300a245c9b1dd00c4dde10102203d90920cda350525156a4cd7e48a6f64f6c564fff0fcc3db54ef6a3f73d3a241
 . . . . [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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