DV SSL/TLS Certificate for s-tenkai.co.jp

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the s-tenkai.co.jp DV SSL/TLS Certificate

This certificate with serial number 05:62:36:a1:d8:94:4e:d1:0a:b5:47:ef:eb:0b:b3:47:40:44 for s-tenkai.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 s-tenkai.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): 05:62:36:a1:d8:94:4e:d1:0a:b5:47:ef:eb:0b:b3:47:40:44
Serial Number (int): 468981720281370447204617215067619060039748
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: f1:c9:0d:91:fa:6e:6f:76:62:1e:58:55:f1:bc:5f:1f:e1:c6:75:58
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): 1f:9e:be:9f:f6:df:09:65:a5:8f:43:62:11:c8:c3:d2:4d:c9:6d:fe
Fingerprint (SHA-256): 0a:06:99:3e:15:92:6e:c9:ce:4f:29:16:0d:88:16:f6:08:0a:6d:1a:89:6b:83:a3:7e:4b:88:8b:ab:9d:ed:f2

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

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/69.crl

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

Advanced Certificate Properties

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsPsprK5rY7FAR2hBAtWd
X/oEXAimb37ArFZx+rdyappe0yfkrsjpBzY/iXHGhX0p+cEJ70mhKYEHpV1qBLnt
QY1k3IyyuIRJE7WZe/xCJHEEbcBx0dQpIO4cNgdbfeUZxmrIU+ZH0TH13lKcCobg
2QOwib0ewHO9v1Zfgi7vyv9DqDNpSzYPz+Hk8VcQBC3KdxxeweX2cQGAofmKtpNU
8K/ISNzpJraM4v4ZlM5hFhcz6sHZI3Qb/pQBkShGwqfJzwOsUCwq4+vy30oL0RVV
/lJOUKdsXtki+vMYzlqzDRhnNXPGVzlE76P5LkHsIrMS5jJC2GYCetKG9WvwLWQc
MwIDAQAB
-----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 468981720281370447204617215067619060039748
 . . . . . . . . [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 2025-07-11 15:02:24 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-09 15:02:23 +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 's-tenkai.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 22341794662410385179920467546777489034170688396070069319658180012466789154079061193231465721614671224240429399401936418852586787848613749486744844055239857222176535053861568859939109820822953230412135152826674007457604978494675165758054933039145674350043371309455616553056059552767866518214202906840709948769957353653918046480945612703857184030521804034899849697972568003936482603898921817976880980863471828750930054033790451094980883648257032416046585536983458067235071825505475017102551001488138240072719628881412344659624264060675549548434884417146134122978765852319032724921544006738766717417582193180204593323059
 . . . . . . . . . . . . . . . . . . . . [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)
							f1c90d91fa6e6f76621e5855f1bc5f1fe1c67558
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 's-tenkai.co.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.s-tenkai.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://r10.c.lencr.org/69.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)
							00f0007600a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197fa37dfa700000403004730450221008154055aabef85a52b68e3133902770355498188331aa7e1b7a7fc2e24758908022041d3ddfc637af84b6516c2c13ca7a9a70b1222268533a49b2fd31ada520ec323007600dddcca3495d7e11605e79532fac79ff83d1c50dfdb003a1412760a2cacbbc82a00000197fa37dff2000004030047304502205d4d0c60b323f1819d6a175cc8024000824b62bda5a84cf54c0c183fe64c6525022100873b902c094d493f5bbd758728adf1f7d1645edb4bb62adca4ed09bda1c79fa1
 . . . . [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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